If a person walks at 5 km/hr instead of 4 km/hr, he would have walked 6 km more. The actual distance traveled by him is?	Choose the correct choice from the following answers:	A) 14	B) 20	C) 18	D) 24	E) 21

Rationale: "let the actual distance traveled be x km . then , x / 4 = ( x + 6 ) / 5 x - 24 = > x = 24 km . answer : d"
Answer: D