Question

135. The simple interest on a certain sum for 2.5 years at 12 per cent per
annum is 300 less than the simple interest on the same sum for
4.5 years at 8 per cent per annum. Find the sum.​

Answer 1

Answer:

5000

Step-by-step explanation:

let sum be P

difference between simple interest is 300

simple interest on 12%

= P *12*2.5/100 = 3P/10

simple interest on 8%

=P*8*4.5/100 = 9P/25

9P/25 - 3P/10

= (18P - 15P)/50 = 3P/50

3P/50 = 300

P = 5000