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The "Back sight" reading on a vertically held staff at a point A on the floor along the centre line of a railway tunnel is 3.465 m, and the "Fore sight" on the inverted staff held at the roof of the tunnel just vertically above A is 1.115 m. The height of the tunnel along the centre line at floor point A is
🗓 Jul 9, 2021
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Rachel
🌐 India
Answer is fine but where is solution?
votes
Gabriella
🌐 India
give solution please
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