Question

A sum of rs.5000was lent partly at 6% and partly at 9% si.if the total annual interest is rs. 390, the ratio in which the money was lent at given rates is

Answer 1

Answer:

let the sum lent at 5% be Rs.x and that lent at 8% be Rs.(1550-x). then, 

 

Interest on x at 5% for 3 years + interest on (1550-x) at 8% for 3 years = 300

 

$\frac{x \times 5 \times 3}{100} + \frac{(1500 - x) \times 8 \times 3}{100} = 300$

Required ratio =  x : (1550-x) = 800 : (1550-800) = 800 : 750 = 16 : 15