Ram gets ₹150 simple interest for 4 years. If the sum increased 5 times of itself for next 4 years then find the total simple interest for 8 years.

₹900

Interest in 4 years = 150

Interest in 1 year = 37.5

Sum becomes 5 times, so interest per year will also become (37.5 x 5) 187.5

interest for next 4 years = 187.5 x 4 = 750

Total interest = 150 + 750 = 900