Question

find the principal and simple interest when the final amount is rupees 4500 at 20 %per annum for 5 years

Answer 1

Principle×Rate×Time/100=interest
Principle×20×5=100(Interest)
principle=100(Interest)/100
principle = interest
principle + interest = final amount
2(principle) = 4500.
(because ,principle =interest)
principle=4500/2
principle = 2250 = interest