3. A train runs from New Delhi to Kolkata. It first covers a distance of 400 km in 7 hours and then
a distance of 550 km in 8 hours. Calculate the speed and identify whether the train moves in
uniform or Non-uniform motion.
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Answer:
speed = 63.33 km/hr and it is non uniform motion
Explanation:
given : a train complete its journey in two parts
In Ist it covers distance = 400km
time taken = 7hrs
In IInd it covers distance = 550 km
time taken = 8hrs
hence , avg. speed = total distance / total time
= 400 +550/7+8 km/hrs
= 950/15 km/hrs
= 63.33 km/hr
it is non uniform motion
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