Question

At simple interest a suro becomes 1.5 times of itself in 5 years. The state
q interest per cent per annum is :​

Answer 1

Explanation:

Let sum of money =P and Rate be P.

For Part 1

A=1.5P

T=3

A=P(1+ 100RT )

⇒1.5P=P(1+ 1003R )

⇒0.5= 1003R

⇒R= 3

100×0.5

= 350

For Second Part

A=3P

R= 350

Time=T

ATP, 3P=P(1+ 3×10050T)

⇒3=1+ 30050T

⇒2= 6T

⇒T=12

Hence, Time required =12 years.