In what time will Rs.4200 lent at 3% per annum on simple interest earn as much interest as Rs.5000 will earn in 5 years at 4% per annum on simple interest? Choose one:	A) 8 1/3	B) 8 1/6	C) 8	D) 8 1/2	E) 8 1/5
(4200*3*R)/100 = (5000*5*4)/100   R = 8   Answer: 8
<result>C</result>
In what time will Rs.4200 lent at 3% per annum on simple interest earn as much interest as Rs.5000 will earn in 5 years at 4% per annum on simple interest?