If P1 amount at R1 rate and P2 amount at R2 rate then rate at common sum of money

If the amount is 2 1/4 times of the sum after 2 years, then the rate of compound interest must be

The simple interest on a certain sum of money invested at a certain rate for 2 yr amounts to Rs.1200. The compound interest on the same sum of money invested at the same rate of interest for 2 yr amounts to Rs.1290. What was the principal?

The simple interest on a certain sum of money invested at a certain rate for 2 years amounts to Rs. 1200. The compound interest on the same sum of money invested at the same rate of interest for 2 years amounts to Rs. 1290. What was the principal ? A. Rs. 12000 B. Rs. 16000 C. Rs. 6000 D. Rs. 4000

A sum of ₹ 600 amounts to ₹720 in 4 years. What will it amount to if the rate of interest is incereased by 2%?

If P is the principal, R is the rate of interest per annum and n is the time period, find the amount at the end of the nth year if the interest is compounded yearly.

If there are three sum of money P,Q and R so that P is the simple interest of Q and Q is the simple interest of R, rate % and time are same in each case, then the relation of P, Q and R is given by

A sum of Rs. 400/- amounts to Rs. 480/-in 4 years. What will it amount to if the rate of interest in increased by 2% ?