NCHMCT JEE 2019 Question Paper with solutions for online practice

Question : 28 of 200

Marks: +1, -0

A motorist travels to place 150 km away at an average speed of 50 km/hr and returns at 30 km/hr. Find out the average speed for whole journey.

Solution:

Required average speed

={2xy}/{x+y}

={2×50×30}/{50+30}

=3000/80

=37.5

km/hr

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