Question

if the interest of 100 for 3 year at the rate 10 percent per year is same as the interest of 200 for 5 year at he rate x percent per year then x=​

Answer 1

the rate of interest in the second case is 3 percent .. if it is simple interest.

Step-by-step explanation:

we all know that ... I=PRT/100

in the 1st case

where ,

p=principle amount = 100rs

R= rate of interest = 10 percent

T=time = 3 year

I=simple interest = ??

I =prt/100

I = 100×10×3/100

**I= 30 rs

in 2nd case

where,

p=principal amount = 200rs

R= rate of interest = X

T= time = 5 year

I= simple interest =??

I=prt/100

I = 200×X×5/100

I = 10x

ACCORDING TO QUESTION

10x=30

x=3

rate of interest is 3 percent if the principal amount is 200 rupees for 5 year