Question

The difference between CI and SI on a certain sum for 2 yrs at 5% per annum is 40rs what is priciple amount

Answer 1

Answer:

16000

Step-by-step explanation:

let principle be x

si = x × 5 ×2/100

ie x/10

a = x(1 + 5/100)²

= x × 105 /100 × 105/100

ci = 11025x/10000 - x

= 11025x - 10000x/10000

= 1025x/10000

ci - si = 40

1025x/10000 - x/10 = 40

1025x - 1000x/10000 = 40

25x = 400000

x = 400000/25 = 16000