A steady stream of water travels through an enclosed tank, as seen in the illustration. At section 1, D1 is equal to six centimeters, and the volume flow equals one hundred m3/h At section 2, the average velocity is 8 meters per second, and D2 equals 5 centimeters. If D3 is equal to 4 centimeters, then (a) what is Q3 in m3/h and (b) what is the average V3 in m/s?

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