If Rs.10 be allowed as true discount on a bill of Rs.110 at the end of a certain time , then the discount allowed on the same sum due at the end of double the time is?	Choose the correct choice from the following answers:  A) 68.33  B) 18.33  C) 28.33  D) 48.33  E) 98.33
Explanation:   Present worth = Amount - TrueDiscount   = 110 -10 = Rs.100   SI on Rs.100 for a certain time = Rs.10   SI on Rs.100 for doube the time = Rs.20   TrueDiscount on Rs.120 = 120 - 100 = Rs.20   TrueDiscount on Rs.110 = = Rs.18.33   Answer: 18.33
<result>B</result>
If Rs.10 be allowed as true discount on a bill of Rs.110 at the end of a certain time , then the discount allowed on the same sum due at the end of double the time is?