Question { 15140 }

2 hours after a freight train leaves Delhi a passenger
train leaves the same station travelling in the same
direction at an average speed of 16 km/hr. After travelling
4 hrs the passenger train overtakes the freight train. The
average speed of the freight train was?

Answer

passenger train cross after 4 hrs of starting

but freight train already leaves station before 2 hrs of
passenger train

so the passenger train and freight train speed ratio

passenger train travel hrs : freight train travel hrs = 4:6

passenger train speed in hrs 16km/hr;

then freight train speed = x;

then

4/6 = x/16

then x = 10.66

the freight train speed in hrs = 10.66 km/hr