Question

Find the diameter of a circle whose circumference is 35.2 cm

Answer 1

dπ=35.2
D=35.2×7/22
D=16×7
D=11.2

Answer 2

Given:

Circumference=35.2 cm

To find:

The circle's diameter

Solution:

The required diameter is equal to 11.2 cm.

We can calculate the required value of the diameter by using the formula of obtaining the circle's circumference.

Circle's circumference=2πr, where r is the radius.

Using values,

35.2=2×22/7×r

35.2×7/44=r

88×7/110=r

8×7/10=r

5.6=r

Now, the value of the diameter=2(radius)

=2(5.6)

=11.2 cm

Therefore, the required diameter is equal to 11.2 cm.