Home » Aptitude » Speed, Time and Distance » Question
  1. 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 :
    1. 42
    2. 40
    3. 35
    4. 45
Correct Option: B

Total distance = 100 km.

Total time =
50
+
40
+
10
504020

= 1 + 1 +
1
=
5
hours
22

∴ Average speed =
100 × 2
= 40 kmph
5



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