Question

Find the simple interest on ₹ 900 for 3 years 4 months at 5% per annum.

Find the amount also.​

Answer 1

Answer:

We know that the formula to find the amount in the case of simple interest is

p + ptr/100 = p(1 + tr/100) where p is the principal, t is the time in years and r is the rate of interest.

So p(1 +3r/100) = 850

=> r = (850/p - 1)×(100/3) ……(1)

p(1 + 4r/100)= 900

=> r = (900/p - 1)×(100/4) ………(2)

Comparing (1) and (2) we get

(850/p - 1)×(100/3) = (900/p - 1)100/4

=> 4(850/p - 1) = 3(900/p - 1)

=> 3400/p - 4 = 2700/p - 3

=> 700/p = 1 => p = 700

So the sum is 700

Step-by-step explanation:

Hope itz helpful to u...........

Answer 2

Principal = Rs 900
Rate = 5% per annum
Time = 3 years 4 months = 3 1/3 = 10/3 years
SI = P x R x T / 100
= 900 x 5 x 10/300
= 150