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Find the total volume of rain in cu m and divide by the time it took to fall:

1 ha = 10000 m²

1 mm = 1/1000 m

→ volume = area × depth = 91.86 ha × 42 mm

→ volume = 91.86 ha x 42 mm = 91.86 x 10000 m² x 42 x 1/1000 m = 38581.2 m³

→ rate of fall = volume ÷ time = 38581.2 m³ ÷ 9300 s ≈ 4.149 m³/s

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Q: How many cubic metres of rain per sec would fall on a farm of 91.86ha in 9300secs if totall fall was 42mm?
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