किसी निश्चित राशि पर 23% प्रति वर्ष की दर से 4 वर्षों का साधारण ब्याज, उसी राशि पर उसी दर से 8 वर्षों के साधारण ब्याज से ₹11,960 कम है। वह राशि ज्ञात कीजिए।

A sum becomes 2215 of itself in 6 years at simple interest. Find the rate of interest per annum.

In how many years will a sum of ₹5,500 amount to ₹6,600 at a simple interest rate of 5% per annum?

A sum of money amounts to ₹16000 in 6 years at simple interest of 25 percent per annum. What will be the total interest for 6 years?