Mathematics · Compound Interest

Alpha Ventures and Beta Solutions borrowed the same sum of money from a bank at the same rate of interest compounded annually for 3 years and 4 years respectively. If the amount paid by Alpha Ventures at the end of 3 years is ₹45,000 and the amount paid by Beta Solutions at the end of 4 years is ₹51,750, what is the rate of interest per annum?