Question

a sum of money invested at 6% p.a. simple intrest for a certain period of time yeilds rs 960 as intrest. if this sum had been invested for 5 years more it would have yeilded rs 2160 as intrest. find the sum

urgent!

Answer 1

5 years interest = 2160-960 = 1200
int for one year = 1200/5= 240
int for 4 years = 960
let sum be p, time be n, rate of int be r
simple int = pnr/100
960= p* 4* 6/100
p= 960*100/4*6
= Rs. 4000

Answer 2

Answer:

5 years interest = 2160-960 = 1200

int for one year = 1200/5= 240

int for 4 years = 960

let sum be p, time be n, rate of int be r

simple int = pnr/100

960= p* 4* 6/100

p= 960*100/4*6

= Rs. 4000

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