A sum of ₹1200 becomes ₹1344 in 2 years at a certain rate of simple interest. What is the rate of interest per annum?

ब्याज = 1344 - 1200 = 144। समय = 2 वर्ष। सूत्र I = (P*R*T)/100 का उपयोग करते हुए: 144 = (1200*R*2)/100 => 144 = 24R => R = 6%।