Question

If a sum of money doubles itself in 6 years. It becomes 5 times in how many years?​

Answer 1

Step-by-step explanation:

15years ..................

Answer 2

ANSWER

Let the sum of money be 100 which amounts to 200 ( doubles itself ) in 6 years time. Interest on 100rs. Is 100. Putting the following in simple interest formula. You get

100= 100*R*6/100

R= 100/6

Now when 100 will become 5 times i.e 500 the interest will be 400rs.

Putting in simple interest formula

400= (100*100/6*T)/100

= 2400/100 = 24 years.