NCHMCT JEE 2015 Question Paper with solutions for online practice

Question : 16 of 200

Marks: +1, -0

A train goes 400 km at an average speed of 50 km/h and returns at an average speed of 40 km/h. Find the average speed of the train for the whole journey?

45 km/h
40 km/h
44.44 km/h
55.55 km/h

Validate

Solution:

Average speed of the train for the whole Journey
=

{2S_1×S_2}/{S_1+S_2}

{2×50×40}/{50+40}

{4000}/{90}

{400}/9

= 44.44 km/hr

Go to Question:

Prev Question

Next Question