SSC CPO SI and ASI 2013 Paper

Question : 122 of 200

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 distance. The average speed, in km/hour, for the whole journey is

Validate

Solution:

(2) Let the total distance = 100 km
Total time

= {50}/{50}+ {40}/{40}+ {10}/{20}

=1+1+ {1}/{2}= {5}/{2}

hours
Average speed

= { { \distance }}/{ { \time }}= {100}/{ {5}/{2}}=40 {kmph}

Go to Question:

Prev Question

Next Question