A train has a speed of 60 km/h for the first one hour and 40 km/h fo

Question -

A train has a speed of 60 km/h for the first one hour and 40 km/h for the next half hour. Its average speed in km/h is

Options:

A . 50

B . 53.33

C . 48

D . 70

Answer: Option B
:
B

Distance travelled by train in first 1 hour is 60 km and distance in next $\frac{1}{2}$ hour is 20 km.

$v_{a v g} = \frac{60 + 20}{1.5}$

$= 53.33$

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