SOLUTION: On 5th June 2011, 124 mm of rainfall was recorded over an area of 28 km2. If the rainwater falling onto the area was drained through two channels each with a cross-sectional area o

Question 1014716: On 5th June 2011, 124 mm of rainfall was recorded over an area of 28 km2. If the rainwater falling onto the area was drained through two channels each with a cross-sectional area of 18m2 at a rate of 26.4 m/s, find the time, to the nearest minute, required for the channes to drain off the rain.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Find the volume of water first, converting to meters for consistent units.

The volume flow rate (remember there are two drains) was then,

where is the number of seconds to drain,

Or in minutes,

or 61 minutes to the nearest minute,
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