please help me friends .solve the 5th question only.
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first convert 42 km/h into m/s and then divide 280 m by the answer
tanya143123:
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42km/h = 11.6 m/s . so as we know s=d/t so t = 280 / 11.6 which is 24.1
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The train is running at a speed of 42kmph. So the distance covered by train in meters per second is:
42*(5/18)=35/3 m/sec
Now the time required to the train to cross a man of is the same amount of time that train will take to cross itself that is 280 m.
So 280*(3/35) = 24 seconds.
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