Discussion of Question with ID = 010 under Simple-Interest

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Question

Mr. X borrowed Rs. 500 from Mr. Y on simple interest @2% for 15 years. He then adds an amount x to it and lends it to Mr. Z @8% for the same duration. What is x if he gains Rs. 690?

A

Rs. 200.

B

Rs. 300.

C

Rs. 250.

D

Rs. 400.

Soln.
Ans: a

His gain is ${(500 + x) × 8 × 15}/100$ - ${500 × 2 × 15}/100$ = 690. We can solve this for x to get x = Rs. 200.


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