Question

In how much time will a sum of money become triple itself at 10% per annum simple interest

Answer 1

The answer is above

Answer 2

Solution :

♢ Let the principal ( P ) = x

♢ Amount ( A ) = 3x

☆ Simple interest = Amount - Principle

➳ $\qquad$ 3x - x

➳ $\qquad$ 2x

$\rule {300}{1.5}$

☆ Rate of interest ( R ) = 10%

☆ Let the time = T years

$\rule {300}{1.5}$

Now ,

➳ ( PTR )/100 = S.I

➳ T = ( 100 × S.I )/( PR )

➳ T = ( 100 × 2x )/( x × 10 )

➳ 10 × 2

♡ Answer : 20 years