pyq/2020/csat/28

Let x, y be the volumes; m, n be the masses of two metallic cubes P and Q respectively. Each side of Q is two times that of P and mass of Q is two times that of P. Let u = m / x and v = n /y. Which one of the following is correct?

(A) u = 4v

(B) u = 2v

(C) v = u

(D) v = 4u