Aptitude - Compound Interest - Discussion
Discussion Forum : Compound Interest - Data Sufficiency 2 (Q.No. 1)
Directions to Solve
Each of the questions given below consists of a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
1.
What is the rate of interest p.c.p.a.? | |
I. | An amount doubles itself in 5 years on simple interest. |
II. | Difference between the compound interest and the simple interest earned on a certain amount in 2 years is Rs. 400. |
III. | Simple interest earned per annum is Rs. 2000. |
Answer: Option
Explanation:
| I. | P x R x 5 | = P  R = 20. |
| 100 |
| II. P |  |
1 + | R |  |
2 | - P - | P x R x 2 | = 400 PR2 = 4000000. |
| 100 | 100 |
| III. | P x R x 1 | = 2000 PR = 200000. |
| 100 |
 |
PR2 | = | 4000000 | R = 20. |
| PR | 200000 |
Thus I only or (II and III) give answer.
Correct answer is (E).
Discussion:
8 comments Page 1 of 1.
Soundharya said:
6 years ago
Can you please explain the step 2?
(1)
Anomies said:
7 years ago
I didn't get details of PCPA. Please, anyone explain me.
(2)
Anomi said:
8 years ago
In 2nd statement, it is given... Time=2years and C.I - S.I=400. ------> let eq.(1).
So by formula, C.I=Amount - Principle and S.I=(P*R*T)/100, Amount=P*(1+(R/100))^n
Now, put all the formulas and values in eq. 1 and get the result.
So by formula, C.I=Amount - Principle and S.I=(P*R*T)/100, Amount=P*(1+(R/100))^n
Now, put all the formulas and values in eq. 1 and get the result.
(1)
Jyothi said:
8 years ago
I can't understand 2nd statement please explain briefly.
(1)
Akshay said:
9 years ago
In statement 2, it didn't say that both are calculated at the same rate. I don't see how that statement is correct?
(1)
Sumanth anem said:
10 years ago
Any body please explain about statement 2?
(1)
Ruchi said:
1 decade ago
In statement 1 it has given that amount doubles itself that means S.I = principal amount.
Let amount will be p.
So by the formula S.I = p*r*t/100.
where S.I = p.
So, p=p*r*5/100 den when we add S.I to amount that gives double of amount.
Let amount will be p.
So by the formula S.I = p*r*t/100.
where S.I = p.
So, p=p*r*5/100 den when we add S.I to amount that gives double of amount.
(1)
Karishma saxena said:
1 decade ago
I didn't get tht how the satetment 1 is alone sufficient.
Please explain it ASAP.
Please explain it ASAP.
(1)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers