A train covers a certain distance in 40 minutes if it runs at a speed of 50 km per hr. What is the speed at which the train must run to reduce the time of journey to 30 minutes?
Get preparation tips and success stories of GRE from all over the world.
GRE ® is a registered trademark of the Educational Testing Service (ETS). This site is not endorsed by ETS. © Copyright 2008 - 2015 JustGRE.com