First,

The volume is given by the integral (one of 6 possible combinations),

I would say the answer would be B
Answer:
27+36=9 (3+7)
Step-by-step explanation:
27+36= 2(70+36)
He missed (71 - 37)/71 x 100 = 34/71 x 100 = 0.48 x 100 = 48%.
Volume = 1/3*a^2*h
So, V = (36*7)/3
= 84