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# ICSE Class 8 Answered

rainfall measuring 4.2cm on a flat roof with dimension 4m * 6m is collected in a rectangular tank with 3.2m * 1.5m in dimension. Assuming no loss of water due to evaporation,  find the depth of the water in tank in mm.
Asked by sumitaagarwal111 | 13 Feb, 2019, 05:09: PM
Expert Answer
volume of rain water collected at roof = 4×6×4.2×10-2 = 1.008 m3

depth of water in tank = 1.008/(3.2×1.5) = 0.21 m = 210 mm
Answered by Thiyagarajan K | 13 Feb, 2019, 05:44: PM

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