Question

A MAN DEPOSITED RS. 18000 IN A BANK FOR ONE YEAR TO EARN SOME INTEREST . IF THE SAME INTEREST IS TO BE EARNED IN 8 MONTHS AT THE SAME RATE , WHAT SUM SHOULD BE DEPOSITED BY HIM ?

Answer 1

SI=ptr/100 and X be the rate of interest

i.e., SI=18000*1*x/100

Let p be the principle amount which he deposited for 8 months

i.e., 18000x/100=p*(8/12)*x/100

on solving htis we get x=27000/- which must be deposited for 8 months.

Answer 2

let no z

18000×1×z/100=18000×2/3×2

180z=120z

z=3/2

18000×3/2

=27000