If $10 be allowed as true discount on a bill of $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:	Choose the correct choice.
A) $ 18.33	B) $ 22.33	C) $ 28.33	D) $ 26.23	E) $ 16.23

Rationale: s . i . on $ ( 110 - 10 ) for a certain time = $ 10 . s . i . on $ 100 for double the time = $ 20 . t . d . on $ 120 = $ ( 120 - 100 ) = $ 20 . t . d . on $ 110 = $ ( 20 / 120 * 100 ) = $ 18.33 answer : a
Answer: A