Sasi Math (Revised for 1024)

Scroll:Measurements >> Circle >> saq (4479)

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.

Find the circumference of a circle whose radius is 4.9m

___m

Answer:_______________

Find the circumference of a circle whose radius is 56cm

___cm

Answer:_______________

Find the circumference of a circle whose radius is 15.1cm

___cm

Answer:_______________

Find the circumference of a circle whose radius is 5.6m

___m

Answer:_______________

Find the circumference of a circle whose radius is 63cm

___cm

Answer:_______________

Find the circumference of a circle whose radius is 17.1cm

___cm

Answer:_______________

Find the circumference of a circle whose radius is 1.4m

___m

Answer:_______________

Find the circumference of a circle whose radius is 42cm

___cm

Answer:_______________

Find the circumference of a circle whose radius is 26.1cm

___cm

Answer:_______________

10)

Find the circumference of a circle whose radius is 2.1m

___m

Answer:_______________

Find the circumference of a circle whose radius is 2.8m

Answer: 17.6m

SOLUTION 1 :

Given,

r = 2.8m

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 2.8

= 2 x 22 /7 x ~~2.8~~^0.4

= 44 x 0.4

= 17.6 m

Circumference of circle is 17.6m.

Find the circumference of a circle whose radius is 56cm

Answer: 352cm

SOLUTION 1 :

Given,

r = 56cm

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 56

= 2 x 22 /7 x 56⁸

= 44 x 8

= 352 cm

Circumference of circle is 352cm.

Find the circumference of a circle whose radius is 15.1cm

Answer: 96.8cm

SOLUTION 1 :

Given,

r = 15.1cm

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 15.1

= 2 x 22 /7 x ~~15.1~~^2.2

= 44 x 2.2

= 96.8 cm

Circumference of circle is 96.8cm.

Find the circumference of a circle whose radius is 4.9m

Answer: 30.8m

SOLUTION 1 :

Given,

r = 4.9m

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 4.9

= 2 x 22 /7 x ~~4.9~~^0.7

= 44 x 0.7

= 30.8 m

Circumference of circle is 30.8m.

Find the circumference of a circle whose radius is 63cm

Answer: 396cm

SOLUTION 1 :

Given,

r = 63cm

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 63

= 2 x 22 /7 x 63⁹

= 44 x 9

= 396 cm

Circumference of circle is 396cm.

Find the circumference of a circle whose radius is 17.1cm

Answer: 105.6cm

SOLUTION 1 :

Given,

r = 17.1cm

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 17.1

= 2 x 22 /7 x ~~17.1~~^2.4

= 44 x 2.4

= 105.6 cm

Circumference of circle is 105.6cm.

Find the circumference of a circle whose radius is 3.5m

Answer: 22m

SOLUTION 1 :

Given,

r = 3.5m

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 3.5

= 2 x 22 /7 x ~~3.5~~^0.5

= 44 x 0.5

= 22 m

Circumference of circle is 22m.

Find the circumference of a circle whose radius is 42cm

Answer: 264cm

SOLUTION 1 :

Given,

r = 42cm

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 42

= 2 x 22 /7 x 42⁶

= 44 x 6

= 264 cm

Circumference of circle is 264cm.

Find the circumference of a circle whose radius is 26.1cm

Answer: 162.8cm

SOLUTION 1 :

Given,

r = 26.1cm

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 26.1

= 2 x 22 /7 x ~~26.1~~^3.7

= 44 x 3.7

= 162.8 cm

Circumference of circle is 162.8cm.

10)

Find the circumference of a circle whose radius is 5.6m

Answer: 35.2m

SOLUTION 1 :

Given,

r = 5.6m

circumference of the circle = 2πr

= 2 x $\frac{22}{7}$ x 5.6

= 2 x 22 /7 x ~~5.6~~^0.8

= 44 x 0.8

= 35.2 m

Circumference of circle is 35.2m.