Question 738663
we know "W varies inversely with square of T", so we can write the proportion as

W = k / (T^2)   where k is the constant of proportionality

for W=63 when T is 3 we have

63 = k / 3^2 and k = 63 * 9 = 567

now when T = 12, we have

W = 567 / 12 = 47.3