In a 280 meters race A beats B by 56 m or 7 seconds. A's time over the course is:  Choose the correct choice from the following options
A) 22 seconds  B) 12 seconds  C) 10 seconds  D) 18 seconds  E) 28 seconds

Rationale: "b runs 56 m in 7 sec . = > b runs 280 m in 7 / 56 * 280 = 35 seconds since a beats b by 7 seconds , a runs 280 m in ( 35 - 7 ) = 28 seconds hence , a ' s time over the course = 28 seconds answer : e"
Answer: E