Question

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1)At what rate percent will a sum of money double itself in 5 years.

2)Ravi invested Rs.5000 for 5 years and Rs.4000 for 3 years at the same rate of interest. He received a total interest of Rs.2960 what was the rate of interest.

3)A certain amount of money becomes double in 5 years . In how many years will it be the triple of the interest rate remain same.

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

Answer 1

i have posted answers to ques 1,3 and 4