Q. 4 A

Find out th

Answer :

i) is correct. British mines were faced with problem of water seepage, which had to be removed before extracting coal.


ii) is incorrect. Removing water was a labour intensive work, and often required huge expenditures.


iii) is incorrect. Thomas Newcomen developed the water pump, which was used to remove water from mines.


iv) is correct for procedural reasons.

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