RRB NTPC Mains or Stage 2 Model Paper 1 with solutions

Question : 58 of 120

Marks: +1, -0

Kishlay travelled equal distances at speeds of 10 km/hr, 30 km/hr and 2 km/hr and took a total time of 38 minutes. Find the total distance in km.

Solution:

(2) Average speed

={3xyz}/{xy + yz + zx}

[{3× 10× 30× 2}/{300 +60 +20}]

kmph

=1800/380 =90/19

kmph
∴ Distance covered
= Speed × time
=

[90/19×38/60]

km
= 3 km

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