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A train runs at a speed of 42 m/s and takes 35 seconds to pass a tunnel. after travelling some distance, it takes 15 seconds to pass a pole. what is the length of the tunnel? |
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Answer» So, While PASSING the tunnel it takes 35sec Displacement = Velocity × Time Therefore, L(TRAIN) + L(Tunnel) = 42 × 35 = 1470m Now, It takes 15 sec to pass a pole So, L(Train) = 15×42= 630m L(Tunnel) = 1470 - 630 = 840 So, The LENGTH of tunnel is 840m |
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