Question

Q1. A sum of money invested at simple interest triples itself in 8 years. How many times will it become in 20 years time?

Answer 1

let sum of money be P.
for 8years amount= p+ prt/100 and it is tripled
3p = (100p + 8pr)/100.
r = 200/8=25
for 20 yrs amount = p + ( p*20*25)/100
=6p
then it becomes 6 times

Answer 2

Answer:

6

Step-by-step explanation:

P--->3P in 8 years

Then interest in 8 years=3P-P=2P

In 4 year 'P' interest

&In 20 years =20/4*p=5P

Amount after 20 years =P+Interest

=P+5P= 6P