Two persons start running simultaneously around a circular track of length 500 m from the same point at speeds of 15 km/hr and 25 km/hr. When will they meet for the first time any where on the track if they are moving in opposite directions?
Choose one.
A) 11  B) 10  C) 28  D) 45  E) 12
Time taken to meet for the first time anywhere on the track   = length of the track / relative speed   = 500 / (15 + 25)5/18 = 500* 18 / 40 * 5 = 45 seconds.   Answer: 45
<result>D</result>
Two persons start running simultaneously around a circular track of length 500 m from the same point at speeds of 15 km/hr and 25 km/hr. When will they meet for the first time any where on the track if they are moving in opposite directions?