SSC MTS 2 Aug 2019 Shift 1 Paper

Question : 26 of 100

Marks: +1, -0

A travels 15 km with a speed of 30 km/h. He travels another 25 km with a speed of 10 km/h. What is his average speed for the entire journey?

Solution:

Given

\D_1=

15 km ,

\S_1=

30 km/h

\D_2=

25 km ,

\S_2=

10 km/h
Formula Used:
Average speed =

{\D_1+\D_2}/{\D_1/\S_1+\D_2/\S_2}

Calculation:
Average speed for the entire journey =

{15+25}/{15/30+25/10}

40/{0.5+2.5}

=40/3

km/h

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