Directions (1-5): Study the following information carefully and answer the questions given beside.
Krishna invested some money under 20% per annum simple interest in Axis bank. At the end of one – year, he withdrew all amount from the Axis bank and invested in Bandhan bank at the rate of R % per annum under compound interest compounded annually for two years and received Rs. 57600 as total interest from the Bandhan bank. The first year’s interest at Bandhan bank was Rs. 24000.
[WATU 119]