1)

A borrows Rs. 800 at the rate of 12% per annum simple interest and B borrows Rs. 910 at the rate of 10% per annum simple interest. In how many years will their amount of debt be equal ?


A) 18

B) 20

C) 22

D) 24

E) 15

Answer:

Option C

Explanation:

Let the period or time be N years

Given, 800+800×12×N100 =910+910×10×N100

800+96N =91N+910 5N=110 1105 = 22 years.