Question

The ara of a circle is 154cm2.Find its diameter.

Answer 1

Answer:14cm

Step-by-step explanation:

Area of circle = πr^2

154cm^2=πr^2=22/7*r*r

154*7/22=r*r

√49=r

r=7

Therefore diameter=2r

=2*7=14cm

Answer 2

Answer:

44 cm

Step-by-step explanation:

Area of circle=154cm²

πr²= 154

22/7x r² = 154 x 7

                  22

r² = 49

r = √49

r = 7

Circumference = 22πr

                         =  2 x 22/7 x 7

                         = 44 cm