a train 490 M long is travelling at a speed of 120 km per hour in how much time will it pass through a tunnel 100 M long
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no.of train travalle long= 490meter
no.of speed =120
how many time it take to tarvell=120÷100
120÷100=1.2
no.of speed =120
how many time it take to tarvell=120÷100
120÷100=1.2
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