James was hiking on a 10-mile loop trail at a rate of 2 miles per hour. Two hours into James’ hike, John started hiking from the same starting point on the loop trail at 4 miles per hour. What is the shortest time that John could hike on the trail in order to meet up with James?
Options
A) 0.5 hours	B) 1 hour	C) 2 hours	D) 3 hours	E) 4 hours
we don't need to assume here the direction.we need to find which will take less time   so there are 2 cases   1)both moving in same direction...then time would be 2 hours   2)both moving in opposite direction then time would be 1 hour   as we need the shortest time it would be the second case   Answer:1 hour
<result>B</result>
James was hiking on a 10-mile loop trail at a rate of 2 miles per hour. Two hours into James’ hike, John started hiking from the same starting point on the loop trail at 4 miles per hour. What is the shortest time that John could hike on the trail in order to meet up with James?