Question

a person travels four consecutive equal distance at speed of 10 km/h, 20 km/h, 30 km/h, 40 km/h respectively. find average speed of the person during the entire journey​

Answer 1

Answer:

Step-by-step explanation:A man travels equal distances of his journey at 40, 30 and 15 km/h. respectively. Find his average speed for whole journey.

A. 24

B. 25

C. 27

D. 28

Answer: Option A

Solution(By Examveda Team)

Required average speed,

=(3×40×30×15)(40×30)+(40×15)+(30×15)

=24km/hr

Alternatively

Time taken to traveled 13

distance of journey with speed 40 kmph,

=1340=1120

Time taken to traveled 13

distance of journey with speed 30 kmph,

=1330=190

Time taken to traveled 13

distance of journey with speed 15 kmph,

=1315=145Total time taken=1120+190+145=451080Average speed=Total distance traveledTotal time taken=1451080=24kmph

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