A swimming pool 30 meters long is filled with water to a depth of 1 meter at the shallow end and 5 meters at the deep end and abcd the vertical area of the pool has the shape of a trapezium with the area given by S(abcd)= 1/2 (ab + cd) x ad. What is the area of cross-section abcd?
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What would be the volume of the pol if it was 20 metres wide
(1 + 5)/2 * 20 = 60 m2
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