4. A man is walking at the speed of 5 km/h when a train passes by him. If the speed of the
train is 55 km/h and its length is 125 m, how much time will the train take to pass by him if
5. A man walks at the speed of 4 km/h. A train coming from behind him at 22 km/h passes by
same place at the same time and run in opposite
them after one hour.
they travel in (i) the same direction (ii) opposite directions?
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Answer:
2000 will be the answer
Step-by-step explanation:
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in same direction speed = 55-5 = 50km/h = 50*5/18 = 125/9 m/s
in opposite direction = 55+5 = 60km/h = 60*5/18 = 50/3 m/s
T1(same direction) = 125*9/125 = 9 second
T2( opposite direction) = 125*3/50 = 7.5 second
5 ) speed + 22km/hr - 4 km/hr = 20 x 10000/3600 = 5.56 s
time = 30s
distance = speed x time = 5.56 x 30 = 166.8 m
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