Question

a train travels 90km in 2 hours and next 90km in 1 hour calculate its average speed in m/s

Answer 1

✔✔heya here is ur answer!!!

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Total distance travelled = 90km+90km = 180km

Total time taken = 2hrs+1hr = 3hrs

Average speed = total distance travelled/total
time taken

=> speed = 180/3

=> speed = 60km/hr

i.e, 16.6 m/s

Answer 2

Speed =D/T
Speed of first train=90÷2
=45km/h
=(45×5/18)m/s
=12.5m/s
Speed of second train =90÷1
=90km/s
=(90×5/18)m/s
=25m/s