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    				| 1. | A sum ofmoney lent at compound interest for 2 years at 20% per annum would fetch Rs482 more, if the interest was payable half-yearly than if it was payableannually. The sum is:(a) Rs10,000 (b) Rs 20,000 (c) Rs 40,000 (d) Rs 50,000 | 
| Answer» As we know,`CI=P(1+R/200)^(2n) - P``= (1+10/100)^4 - x``=14641x-x``=14641x/10000-x = 4641/10000x``A = P(1+R/100)-P = x(1+20/100)^2-x``= x*36/25-x``=11/25x``H-A = 482``4641x/10000 - 11/25x = 482``4641x/10000-4400x/10000=482``x=482*10000/241`hence, the sum is eqal to`x= Rs. 20,000` | |