: a 150 metres long train crosses a man walking at the speed of 6km/h in the opposite direction in 6 seconds. the speed of the train in km/h is how much?
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Distance covered in 6s = 150m
Relative speed = sum as both motion r opposite in direction = x + 6
We take speed of train to be x km /h
Time = d/s = (150/1000 ) / x+6
6/3600 = 0.15 / x+6
x+6 = 0.15×600
x= 90 - 6 = 84km/h.....
Hope its clear
Thank u★★★
#ckc
Relative speed = sum as both motion r opposite in direction = x + 6
We take speed of train to be x km /h
Time = d/s = (150/1000 ) / x+6
6/3600 = 0.15 / x+6
x+6 = 0.15×600
x= 90 - 6 = 84km/h.....
Hope its clear
Thank u★★★
#ckc
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