Question

If Q is directly proportional to P and Q = 28 when P = 4

i) express Q in terms of P
ii) find the value of Q when P=5
iii) calculate the value of P when Q = 42

Answer 1

May be !

i> Q = 7P

ii> when p =5 then from above eqn we can find Q = 7p and = 7×5=35

iii> from eqn i we can write p = Q/7 So when Q=42 then P=Q/7=42/7=6