Scroll:Life mathematics >> profit and loss >> saq (4314)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.


 

1)  

 Thamarai invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




2)  

 Amutha invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




3)  

 Poovazhagi invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




4)  

 Panimalar invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




5)  

 Selvanayaki invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




6)  

 Keerthi invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




7)  

 Swathi invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




8)  

 Ponnalagu invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




9)  

 Chellamal invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




10)  

 Mithra invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'


Answer:_______________




 

1)  

 Thamarai invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2

 



2)  

 Amutha invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2

 



3)  

 Poovazhagi invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2

 



4)  

 Panimalar invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2

 



5)  

 Selvanayaki invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2

 



6)  

 Keerthi invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2

 



7)  

 Swathi invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2

 



8)  

 Ponnalagu invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2

 



9)  

 Chellamal invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2

 



10)  

 Mithra invested a sum of 12000 at 5% p.a. at compound interest.she received on amount of 13230 after n years. find the value of 'n'

Answer: 2


SOLUTION 1 :

     P     =     12000

     r       =    5%

     A      =    13230

      n     =  

 W.K.T,

      A     =   P[ 1+(r100) ]n

     13230   =  12000[ 1+(5100) ]n   

                 =  12000[1+0.05]n

                 =   12000x (1.05)n

1323012000 = (1.05)n

   (1.1025)2    = (1.05)n

(1.05)2 = (1.05)n

Since the bases are same, equating the powers both the sides, We get, n = 2 years

n = 2