A man walking at 3/4th of the speed, reaches his office late by 2 hours. What is the usual time?  Choose the correct choice from the following
A) 5 hours	B) 3 hours	C) 6 hours	D) 12 hours	E) 15 hours

Rationale: at 3 / 4 th of speed he is late by ' 2 hrs ' x - 3 / 4 ( x ) = 2 x = 8 so 8 - 2 = 6 hrs ( since 2 hrs late ) answer : c
Answer: C