Question

In how many years a principal amount will be 3 times at 10% simple rate of
interest :
(a) 12 yrs. (b) 15 yrs. (c)20 yrs. (d)22 yrs.
​

Answer 1

Answer:

b is the answer 15 years

Answer 2

Step-by-step explanation:

we know that

A=p(1+RT/100)...... (1)

here

p=principle=1

A=total amount=3 (ATQ)

R= rate of intrest=10

find time T=?

put the values in equation (1)

3=1(1+10T/100)

3=(100+10T)/100

300=100+10T

10T=300-100=200

T=200/10=20

therefore T= 20 year's