Two persons start running simultaneously around a circular track of length 400 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) 16 seconds B) 18 seconds C) 19 seconds D) 27 seconds E) 36 seconds
Time taken to meet for the first time anywhere on the track   = length of the track / relative speed   = 400 / (15 + 25)5/18 = 400* 18 / 40 * 5   = 36 seconds.   Answer:36 seconds
<result>E</result>
Two persons start running simultaneously around a circular track of length 400 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?