In How Much Time, Amount Equal to the Principal? If

If the simple interest for 6 years be equal to 30 % of the principal, it will be equal to the principal after .

  1. 10 years
  2. 20 years
  3. 22 years
  4. 30 years
Desire Adnan Default Asked on 7th August 2015 in Maths.
Add Comment
1 Answer(s)

Answer: (2) 20 years

Explanation:-
Let the principal be P  and the rate of interest be R

Formula-
Simple Interest = P x R x T/100
Where, P = principal , R = rate, & T = time.

According to the question,
30 P /100 = P x R x 6/100
30 P = P x R x 6
30 = R x 6
R = 30 /6
R = 5 %

Then,  P = P x 5 x T/100
T = 100/5
T = 20 years
Hence, the answer is (2) 20 years.

Anurag Mishra Professor Answered on 7th August 2015.
Add Comment

Your Answer

By posting your answer, you agree to the privacy policy and terms of service.