Question

Which describes the combined variation in the formula V = ℓwh?


A. V varies jointly with ℓ, w, and h.


B. V varies inversely with ℓ, w, and h.


C. V varies jointly with ℓ and h.


D. V varies directly with w and h

Answer 1

This is the concept of proportionality; we are required to find the combined variation for the volume formula given by:
V=length*width*height
V=lwh
here we see that volume is directly proportional to width, length and height;
therefore the correct answer is:
A] V varies jointly as l,w and h