Question

7. Find the time after which the simple interest on a sum of money will be double of the sum, at the rate
of 10% per annum.

Answer 1

Step-by-step explanation:

With simple interest, you want to know how many years it will take to double your investment. See the formula for simple interest is

Interest=principal∗rate/100∗timeInterest=principal∗rate/100∗time

So here

Principal is 1000

Interest is 1000, as you want to double the investment.

Rate is 10%, so formula become this

=>1000=1000∗10/100∗T=>1000=1000∗10/100∗T

=>T=(1000∗100)/(1000∗10)=>T=(1000∗100)/(1000∗10)

=>T=10years

Answer 2

Answer:

Let P=Rs. x

A=Rs. 2x

∴S1=Rs x

S1=

100

PTR

or, x=

100

x×T×12

or, T=

3

25

year

=

8 year4 months

please follow