Question

A woman deposited a sum of money in the bank at 10% simple interest. How long will it take the money to double?

Answer 1

Answer:

20/11

Step-by-step explanation:

let the amount of money is x rs

the interest of x rs @ 10% in 1 year is x/10 rs

then after 1 year the amount the (principle + interest) of x rs. is 11x/10 rs.

the left amount is (2x-11x/10)rs.

= 9x/10 rs.

(11x/10) rs. - 1 yr.

1 rs. - 1/

11x/10 yr.

2x rs. - (2x * 10/11x) yr.

= 20/11 yrs.