... 3 ∫ 0 30 ydx y ∫30 2.0 cm Now try the following Practice Exercise Q P ... 81 2.25 ̄y = 1 36 (2x 2 ) 2 dx 400 mm 18 = 1 2 50 mm 200 mm 1 4x5 0 3 4x 2 ...
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