So increased weight = 92-80 = 12
so ℅ = 12×100/80 = 15
so his weight is increased by 15℅ !!
I think X is 2. But I am not sure, cuz I don’t know what you teacher is really asking you to do.
ANSWER

EXPLANATION
Use the Pythagoras Theorem to obtain,

This implies that,


Take the positive square root of both sides to get,


The volume is 13*7*5. Therefore, the answer is 455 in^3