Discussion :: Simple Interest

The simple interest on a sum of money is Rs. 50. What is the sum?
I.The interest rate is 10% p.a.
II. The sum earned simple interest in 10 years
A.
I alone sufficient while II alone not sufficient to answer 

B.


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 
Answer : Option E
Explanation :
Given : S.I. = Rs. 50.
I gives, R = 10% p.a.
II gives, T = 10 years.
Sum =  \(\left(\frac{100 *S.I}{T*R}\right)\)  = Rs.  \((\frac { 100*50 } {10*10 } )\)  = Rs. 50.  
Thus, I and II together give the answer.
Correct answer is (E).
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