M is inversely proportional to N. If M is 20, then N is 70. If N = 50, then what is the value of M?

20 700 28 600

28

M is inversely proportional to N. If M is 20, then N is 70. M  α \(\frac{1}{N}\) ⇒ M = \(\frac{K}{N}\)  (K = constant) when M = 20, N = 70, 20 = \(\frac{K}{70}\) ⇒ K = 1400, Now when N = 50, M = \(\frac{1400}{500}\) ⇒ M = 28.