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Arithmetic Ability
Simple Interest

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What is the sum which earned interest? I. The total simple interest was Rs. 7000 after 7 years. II. The total of sum and simple interest was double of the sum after 5 years.

A. I alone sufficient while II alone not sufficient to answer

B. II alone sufficient while I alone not sufficient to answer

C. Either I or II alone sufficient to answer

D. Both I and II are necessary to answer

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Correct choice: D

Explanation:

Let the sum be Rs. x. I gives, S.I. = Rs. 7000 and T = 7 years. II gives, Sum + S.I. for 5 years = 2 x Sum Sum = S.I. for 5 years. Now, S.I. for 7 years = Rs. 7000. therefore, S.I. for 1 year = Rs. 1000. Thus, I and II both are needed to get the answer.

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Arithmetic Ability Simple Interest

Arithmetic Ability
Simple Interest