Question

A sum of money invested at simple interest triples itself in 8 years. how many times will it become in 20 years time? ba

Answer 1

7.5 times

let P be X

then SI= P*R*T/100=

ATQ, 3X=X*R*8/100

R=300/8

In twenty Years

SI=P*R*T/100

=X*(300/8)*20/100=7.5X

IT MEANS 7.5 TIMES

Answer 2

Answer:

6 times

Explanation:

Let the principal be x

Amount =3 x

Time= 8 years

Simple interest= amount - principal

S.I= 3x-x=2x

R=$\frac{S.I100}{p.t}$

R=$\frac{2x.100}{x.8}$

R=$\frac{200}{8}$%

R=25%

NOW,

Time=20 years

S.i=$\frac{P.R.T}{100}$

S.i=$\frac{x.25.20}{100}$

SI=5x

Amount= 5x+x

Amount =6 x

Amount becomes 6 times.

Hence, the correct answer is 6 times