Simple Interest

Q1:
What is the rate of simple interest?
I.  The total interest earned was Rs. 4000.
 II.  The sum was invested for 4 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 not sufficient to answer

E Both I and II are necessary to answer

ANS:D - Both I and II are not sufficient to answer

We know that, R = 100 x S.I.
P x T
Now, I gives, S.I. = Rs. 4000. II gives, T = 4 years. But, P is unknown. So, we cannot find R. So, given data is insufficient to get R.  Correct answer is (D).



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