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Aptitude - Simple Interest - Discussion

Discussion Forum : Simple Interest - Data Sufficiency 1 (Q.No. 1)
Simple Interest
Directions to Solve

Each of the questions given below consists of a statement and / or a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statement(s) is / are sufficient to answer the given question. Read the both statements and

  • Give answer (A) if the data in Statement I alone are sufficient to answer the question, while the data in Statement II alone are not sufficient to answer the question.
  • Give answer (B) if the data in Statement II alone are sufficient to answer the question, while the data in Statement I alone are not sufficient to answer the question.
  • Give answer (C) if the data either in Statement I or in Statement II alone are sufficient to answer the question.
  • Give answer (D) if the data even in both Statements I and II together are not sufficient to answer the question.
  • Give answer(E) if the data in both Statements I and II together are necessary to answer the question.
1.

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.

I alone sufficient while II alone not sufficient to answer
II alone sufficient while I alone not sufficient to answer
Either I or II alone sufficient to answer
Both I and II are not sufficient to answer
Both I and II are necessary to answer
Answer: Option
Explanation:

Given : S.I. = Rs. 50.

I gives, R = 10% p.a.

II gives, T = 10 years.

Sum = 100 x S.I. = Rs. 100 x 50 = Rs. 50.
T x R 10 x 10

Thus, I and II together give the answer.

Correct answer is (E).

Discussion:
8 comments Page 1 of 1.
Apuroop said:   7 years ago
@Blacky.

The principal will be 500.
(1)
Blacky said:   1 decade ago
I think option A will be enough to find the sum

SI=(P*T*R/100)
50=(P*T*R/100)
P=x; t=1; r=10 (10 % 'per' annum i.e. r=10 for 1 year)

50=(x*1*10/100)
x=50 ie Principal=50
Subha Das said:   1 decade ago
Very good. I think it help us so much.
Pratik said:   8 years ago
Very good explanation, Thanks @Blacky.
Sanu said:   8 years ago
Good explanation @Blacky.
Gupta said:   7 years ago
Yes, right @Apuroop.

The Principal will be 500rs.
Harshitha said:   6 years ago
Thanks for explaining it @Blacky.
MAHBUBUR RAHMAN said:   4 years ago
Very good. I think it help us so much. Thanks all for explaing.
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