Question

5. A train moving at a constant speed of 54 km/h moves
eastwards for 30 minutes, then north for 40 minutes.
The average velocity of the train during the run is :
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Answer 1

Answer:

that is your answer avove

Answer 2

Answer:

Hey!

____________________________

Average velocity= Displacement / time

Distance cover in first 30 minutes is= 54*1/2 =27 km (30min= 1/2 hr)

Distance cover in next 40 minutes is=54*40/60 = 36 km

- See the above diagram,

displacement of the object in 70 minutes or 7/6 he is-

From point I to point F = √(27)2+(36)2

=√2045

So displacement= 45 km

And average velocity= 45/(7/6) = 38.79 km/hr