Question

Find the circumference of the circle whose area is 16times the area of the cirlce with diameter 7cm

Answer 1

Answer:

Step-by-step explanation: pi (3.14) * r *r = 16*pi (3.14)* 7/2*7/2

==> r^2= 16*7/2*7/2

==> r^2= 4*7*7

==> r = 2*7

===> r= 14.

Circumference :

2*pi* r

= 2* 22/7* 14

=88 cm^2