1. A through of length L has a cross section in the shape of a semicircle with radius r. When filled with water to within a distance h of the top, the volume V of water is Given that :V = L [0.5tr2 – r²arcsin (=)– h(r2 – h²)ā] Suppose L = 10 ft, r = 1 ft, and V = 12.4 ft³. a. Find the depth of water in the through. b. Use other method to solve part (a). c. Discuss the comparison between method in part a and part b.

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