Question

1)The circumference of a circle is 136 m .Find the area of the circle
2)The area of the circle
3)A circle has area 308 m^2 .Find the diameter of the circle

please answer this question i am giving you 10 points... ;)

Answer 1

so the formula for circumference is 2πr = 136 m where r = radius
Let the radius be r
so 2 x 22/7 x r = 136 
  r = 136/2 x 7/22
r =  21.63 m

so area = 2πr² = 2 x 22/7 x (21.63)² = 2941.68 m²

2) so area = 2πr² = 2 x 22/7 x (21.63)² = 2941.68 m²

3) so area = 2πr² = 2 x 22/7 x r² = 308 m²

r² = 308/44 x 7

r² = 49 

so r = 7 m 

so diameter = 2 x 7 = 14 m

Answer 2

Please watch the attachment.