Question

If Rs. 10 be allowed as true discount on a bill of Rs. 110 due at the end of a
certain time, then the discount allowed on the same sum due at the end of
double the time is? ​

Answer 1

Step-by-step explanation:

Present worth = amount-true discount = 110-10 = 100 rs

SI on 100 for certain time = 10 rs

SI on 100 for double the time = 20 rs

True discount on 120 rs = 120-100 = 20 rs

True discount on 110 = 110 * 20/120 = 18.33 rs

Answer 2

Answer:

18.33

Step-by-step explanation:

Present worth = Amount - True Discount = 110 -10 = Rs.100

SI on Rs.100 for a certain time = Rs.10

SI on Rs.100 for doube the time = Rs.20

True Discount on Rs.120 = 120 - 100 = Rs.20

True Discount on Rs.110 = (110×20120) = Rs.18.33