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Subject :IMO    Class : Class 7

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

A18 years
B20 years
C22 years
D24 years

Ans 1:

Class : Class 9
800+800×12×t100 =910+910×10×t100 800+96t=910+91t 5t=110 t=22years Hence, after 22 years the amount will be equal

Ans 2:

Class : Class 8

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