Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Numerical Ability

Topic

Compound Interest

Question:

A certain sum is invested at 26% p.a, interest compounded annually. In how many years (approx) will it double?

Options:

4

3

2

5

Correct Answer:

3

Explanation:

The Formula that we used here is -

Amount = P$(1 \;+\; \frac{R}{100})^t$

2P = P[ 1 + \(\frac{26}{100}\) ]t

2 = [  \(\frac{63}{50}\) ]t

2 = ( 1.26 )t

On solving , t = 2.99 years

= 3 years   ( Approx )