Answer: your answer will be (b) 0
hope it helps
1: (pi)5^2 = 78.54 then multiply that by 11 and you get 863.94
2: (pi)13^2= 530.93 then multiply that by 8 and you get 47247.44
3. (pi)18^2= 1017.88 then multiply that by 22 and you get 22393.36
This question is worded weirdly, but it means:
8 / (5/2)
= 8 * (2/5)
= 16/5