In a kilometer race, A beats B by 200 meters or 10 seconds. What time does A take to complete the race?	Select: A) 180 sec B) 190 sec C) 290 sec D) 490 sec E) 40 sec

Rationale: "time taken by b run 1000 meters = ( 1000 * 10 ) / 200 = 50 sec . time taken by a = 50 - 10 = 40 sec . answer : e"
Answer: E