A certain sum doubles in 7 years in simple interest. The same sum under the same interest rate will become 4 times in how many years.(साधारण बियाज दर से कोई राशि 7 वर्ष में दुगनी हो जाती है राशि उसी बियाज दर पर कितने वर्षो में चार गुनी हो जाएगी )

A certain sum doubles in 3 years under simple interest. In how many years will the sum become 5 times itself?

A certain sum becomes 4 times in 7 years, at simple interest, then in how many years it will become 16 times?

At which rate of simple interest does an amount become double in 12 years? साधारण ब्याज की किस दर से राशि 12 वर्ष में दोगुनी हो जाती है?

A sum doubles in seven years at simple interest. In how many years will the sum become five times the original sum? एक राशि साधारण ब्याज पर सात वर्षों में दोगुनी हो जाती है | कितने वर्षों में यह राशि मूल राशि से पांच गुना हो जाएगी ?

A sum at a simple interest of 8% p.a. Becomes 7/5 of itself in how many years? 8% प्रति वर्ष साधारण ब्याज पर एक राशि कितने वर्षों में 7/5 गुना हो जायेगी ?

A sum of money placed at compound interest doubles itself in 5 years. It will amount to eight times itself at the same rate of interest in- एक धनसशि चक्रवृद्धि ब्याज पर 5 वर्ष में दुगुनी हो जाती है। ब्याज की समान दर पर वह कितने वर्षो में 8 गुना हो जाएगी?