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8.A train 800m long is running at a speed of 78Kmph ,If it crosses a tunnel in 1 minute, then the
length of the tunnel?

By Rose

8.A train 800m long is running at a speed of 78Kmph ,If it crosses a tunnel in 1 minute, then the
length of the tunnel?
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Rose

দেখাও যে, y = a sinx + b cosr+r sinx সাধারণ সমাধান দ্বারা
+y = 2cosy অবকল সমীকরণ সিদ্ধ হয়।
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2 वर्ष पूर्व पिता का आयु पुत्र की आयु से छः गुणा थी। 18 वर्ष के बाद पिता की आयु से दुगुनी
हो जायेगी। पिता की वर्तमान आय

1 thought on “<br />8.A train 800m long is running at a speed of 78Kmph ,If it crosses a tunnel in 1 minute, then the<br />length of the tunnel?”

  1. Answer:

    500m

    Step-by-step explanation:

    Length of the train = 800m

    Speed of the train = 78km/hr = 78 × (5/18)m/s

    = (65/3) m/s

    Time taken = 1 minute = 60 sec

    Length of the tunnel = x m

    Speed = Total distance/ Time taken

    (65/3) = (800 + x)/60

    (65/3)× 60 = 800 + x

    1300 = 800 + X

    ==> X = 1300 – 800 = 500m

    Reply

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