Question

If r is directly proportional to s and r 8 when s 3 find s when r 11

Answer 1

s = 33/8 or 4 1/8

Explanation:

find 'k', constant of proportionality first:

8 = 3k

k = 8/3

11 = 8/3s

s = 11/1 ÷ 8/3

s = 11/1 x 3/8

s = 33/8 or 4 1/8