Question

A road is 7m wide. The corner is in the shape of a quarter of a circle. The inside radius of the corner is 70m. Ali walks round the corner on the inside, from A to B. Obi walls round the corner on the outside, from C to D. How much further does Obi walk than Ali? Use the value 3.14 for pi

Answer 1

radii = 70 and 77
circumferences = 2 pi * 77 and 2 pi * 70
1/4 of the circumferences = .5 * 77 pi and .5 * 70 pi
difference = .7 * 7 * pi = 4.9 pi

Answer 2

I knew the answer was 2πr ÷ 4

Answer 3

Ur answer is 11 if your pii is 22/7

Answer 4

I want to see the caculation even though my answer is 11