Question

The speed of water in 4 inch square pipe is 10
ft/s. The speed of water in 2 inch square pipe
will be
a. 20 ft/s
b. 40 ft/s
c. 60 ft/s
d.80 ft/s​

Answer 1

Answer:

40ft/s

Explanation:

The size of the pipe at 10ft/s is 4 inch meaning that each side is 4 inches across. If the sides of the pipes are reduced to 2 inches on each side, the total cross-section area of the pipe reduces to a 1/4 of the size of the 4 inch pipe, this means that the water much travel 4 times as fast to allow for the same throughput of water meaning that 10ft/s x 4 is 40ft/s.