RRB Junior Engineer Stage 1 Model Papers 8

Question : 27 of 100

Marks: +1, -0

On a journey across Kolkata, a taxi averages 50 km per hour for 50% of the distance. 40 km per hour for 40% of it and 20 km per hour for the remaining. The average speed in km/hour, for the whole journey is :

Validate

Solution:

Total distance = 100 km.
Total time

=50/50+40/40+10/20=1+1+1/2=5/2

hours
∴ Average speed

={100×2}/5=40 \kmph

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