In a kilometer race, A beats B by 100 meters or 10 seconds. What time does A take to complete the race? Select:
A) 90 sec B) 190 sec C) 290 sec D) 490 sec E) 390 sec

Rationale: "time taken by b run 1000 meters = ( 1000 * 10 ) / 100 = 100 sec . time taken by a = 100 - 10 = 90 sec . answer : a"
Answer: A