Question

The simple interest on a sum for 3 years at 10% is 2100 more than the simple interest on the
same sum for 1 year at 5%. Find the sum.​

Answer 1

let sum = p

according to question

p x 3 x 10/100= p x 1 x 5/100 + 2100

solving the equation

3p/10=p/20+2100

5p/20=2100

p=8400