Question

A sum of money become amount to Rs 10920 at the end of 2 year and Rs 15600 at the end of 5 year. what is the sum of money.​

Answer 1

Answer:

let p be the amount

amount after 2 years =p+pr2=10920=p(1+2r)

after 5 years =p+pr5=p(1+5r)=15600

take the ratio

p(1+2r)/p(1+5r)=10920/15600=1092/1560

(1+2r)/(1+5r)=1092/1560=84/120=7/10

10(1+2r)=7(1+5r)

10+20r=7+35r

15r=3

r=3/15=1/5

put this value of r in any of the above equations

15600=p(1+5×1/5)=2p

p=7800