The commuter rail between Scottsdale and Sherbourne is 200 km of track, and one train makes a round trip in 5 hours. If Harsha boards the train at the Forest Grove station, which is located one fifth of the track's length out from Scottsdale, how long will it take her to get to Sherbourne? Select the correct option:  A) . 5 hours  B) 1 hour  C) 1.5 hours  D) 2 hours  E) 2.5 hours

Rationale: distance between scottsdale and sherbourne = 200 km time for a one - way trip between scottsdale and sherbourne : 5 / 2 = 2.5 hours distance between forest grove and scottsdale : 200 / 5 = 40 km distance between forest grove and sherbourne : 40 x 4 = 160 km time between scottsdale and forest grove : 2.5 / 5 = . 5 hours time between forest grove and sherborne : . 5 x 4 = 2 hours .
Answer: D