Rachit invests ₹12,000 for a 2-year period at a certain rate of simple interest per annum. Prasad invests ₹12,000 for a 2- year period at the same rate of interest per annum as Rachit, but in Prasad's case the interest is compounded annually. Find the rate of interest per annum if Prasad receives ₹172.80 more as interest than Rachit at the end of the 2-year period. 

₹12,000 is lent for one year t the rate of 15% per annum, the interest being compounded annually. If the compounding of the interest is done half- yearly, then how much more interest will be obtained at the end of the one-year period on the same initial sum?

What is the compound interest on ₹24,000 for 2 years at the rate of 10% per annum, if interest is compounded annually?

There is 40 % increase in an amount in 8 years at simple interest. What will be the compound interest  (in rupees) of Rs 30000 after 2 years at the same rate? 

Sanjana invested Rs. 15000 in SI at the rate of 2x% per annum for two years and the same amount is invested in CI at the same rate of interest if she received Rs.150 more interest than S.I, then find the rate of interest per annum?

A bank offers 20% compound interest per half year. A customer deposits Rs 7600 each on 1^st January and 1^st July of a year. At the end of the year, the amount he would have gained from interest is –

In how many years will be Rs. 2,000 amounts to Rs.2,420 at 10% per annum compound interest ?

On what sum does the difference between the compound interest and the simple interest for 3 years at 10 % is Rs 31?