A man gets a simple interest of Rs.800 on a certain principal at the rate of 5% p.a in two years. Find the compound interest the man will get on twice the principal in two years at the same rate. Choose one
A) Rs.500  B) Rs.250  C) Rs.5012.50  D) Rs.5062.50  E) 410
Let the principal be Rs.P   S.I at 5% p.a in 8 years on Rs.P = Rs.800   (P)(8)(5)/100 = 800   P = 2000   C.I on Rs.2P i.e., Rs.4000 at 5% p.a in two years   =4000{ [1 + 5/100]2 - 1} = 4000{ 212 - 202 /202}   = Rs.410   ANSW410R:410
<result>E</result>
A man gets a simple interest of Rs.800 on a certain principal at the rate of 5% p.a in two years. Find the compound interest the man will get on twice the principal in two years at the same rate.