Question

simple interest on a certain sum for 5 years at 8% per annum is rupees 200 less than the simple interest on the same sum for 3 years 4 months at 18 % per annum find the sum​

Answer 1

Explanation:

Let the Principal be 'x'

Case I

Principal=x

Rate of interest=8%

Time=5

Case II

Principal=x

Rate of interest=18%

Time=40/12or10/3( because in simple interest 1 year =12 months )

x*18*10 - x*5*8 =200

_________ _________

100*3 100

180x-120x =200

___________

300

60x=200*300

x=200*300

_________

60

x =1000

The principal is rs1000