Question

W varies directly with the square of n and when n = 5, W = 175. Find n when W = 448

n =​

Answer 1

n = 8.

Explanation:

n^2 × constant nunber = W.

5^2 × constant number = 175. So the constant number is 7.

When W = 448, n^2 = W/7, n^2 = 64.

Thus, n = 8.