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The Brainliest Answer!
2015-03-10T19:59:32+05:30
Water comes out from pipe in 1 sec = 7.5*4.5*1800 = 60750 cm^3 = 6.075 m^3
water comes out from pipe in 30 min = 6.075*30*60 = 10935 m^3
10.8*3.75*rise in level = 10935
rise in level = 10935/ (10.8*3.75) = 10935/40.5 = 270 m
   RISE IN WATER LEVEL = 270m
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