Question

a sum of money invested at 9% p.a amounts to rupees 1,160 in 5 years how much would it amount to in 7 years at 11 1/2 % p.a​

Answer 1

Answer:

find X :

X *(9/100)*5= 1160 -X

X *9/20 = 1160 -X

9X. = 1160 *20 - 20X

29X. = 23200

X. = 23200/29 = 800

now we got 800 Principle

let's find 11 and 1/2 for 7 years

800 + 800*115/1000 * 7

800 + 8* 115/10. *7

800 + 96*7

1472 amount