A can run 2 km distance in 2 min., while B can run this distance in 2 min 40 sec. By how much distance can A beat B?	Choose the correct choice from the following answers:
A) 150 m	B) 100 m	C) 500 m	D) 180 m	E) 190 m

Rationale: a takes time 2 minutes = 120 sec b takes time 2.40 minutes = 160 sec diffrence = 160 - 120 = 40 sec now we are to find distance covered in 40 sec by b 160 sec = 2000 m 1 sec = 25 / 2 m 40 sec = 40 x 25 / 2 = 500 m answer : c
Answer: C