Revenue = (Number of Commodity) times (Unit Price)Originally Posted bymahesasarma

Revenue = Production times Unit Price

R = P*u

Differentiate both sides with respect to time t,

dR/dt = P*du/dt +u*dP/dt

Since dP/dt = +5%, and du/dt = +2%, then,

dR/dt = P*(2%) +u*(5%) -----------------------answer.