Question

Rajiv invest ₹ 9500 in a bank and earn interest ₹ 665. If Deepak invests in the same bank, at the same rate of interest, for the same time period, an amount of ₹ 7,500, what will be the interest that he will earn?

Answer 1

Let the interest Deepak earns be ₹ x

(Rajiv’s principal) : (Deepak’s Principal) ∷ (Rajiv’s Interest) : (Deepak’s interest)

$9500:7500\colon\colon 665:x$

$9500x=7500\times 665$

$x=\frac{7500\times 665}{9500}=₹525$