The compound interest on a certain sum for 2 years at 10% per annum i…

Question

The compound interest on a certain sum for 2 years at 10% per annum is Rs. 525. The simple interest on the same sum for double the time at half the rate percent per annum is = ?

Accepted Answer

Option C. Rs. 500. Answer & Solution Answer: Option C Solution: & 10\% = 110 & Let P = ( 10 )^2 = 100 & Total CI = 21 unit = 525 & 1 unit = 25 & P = 100 unit & = 100 × 25 = 2500 & New Time = 4 years & and new rate = 5\% & SI = 2500 × 4 × 5100 & SI = Rs. 500