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प्रश्न
A train 600 meters long is running at a speed of 90 kms/hr. If it crosses a tunnel in one minute, then the length of the tunnel is:
विकल्प
500 meters
550 meters
600 meters
900 meters
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उत्तर
900 meters
Explanation:
Let the length of the tunnel is `l` m
ATQ,
`(90xx5)/18xx60=600+l`
`25xx60=600+l`
`l =1500 - 600 = 900` m
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