Maths Problem

1. Find the formula and C. I on Rs 2500 for 2 years at 10% per annum. 

2. Find the amount and C. I on Rs 40,000 for 3 years at 5 % per annum.

Answer :-

(i)

Given

Principle (P) = rs. 2500

Time (t) = 2 years

Rate of interest (R) = 10%

We know that

Putting all above values in this equation

So Amount = Rs. 3025

Now,

CI = Amount - Principle

CI =Rs. (3025 – 2500)

CI = Rs. 525

(ii)

Given

Principle (P) = Rs. 40000

Time (t) = 3 years

Rate of Interest (R) = 5%

We know that

Putting all above values in this equation

A = 40000 ( 1 + 5/100 )³

A = 40000 ( 105 / 100 ) ³

A = 40000 ( 21 / 20 ) ³

A = 40000  x 21/20 x 21/20 x 21/20

A = 5 x 21 x 21 x 21

A = Rs. 46,305

Now,

CI = Amount - Principle

CI =Rs. (46305 – 40000)

CI = Rs. 6305