Question

Find the diameter of a circle whose circumference is 66 cm

Answer 1

Hi!!

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Since Circumference of a circle = pi * diameter

Given :

Circumference of a circle = 66cm

Let diameter be d.

=) 66cm = pi * d

=) 66cm = 22/7 * d

=) 66cm * 7 / 22 = d

=) 3* 7 cm = d

=) 21cm = d..

Hence diameter of a circle is 21cm.

Hope it's helpful to u.

Answer 2

Circumference = 2Πr
2×22/7 × r= 66
r= 21/2

Diameter= 2r
= 2(21/2)
= 21