A golf course sprinkler system discharges water from a horizontal pipe at the rate of 7200 cm^3/s. At one point in the pipe, where the radius is 4.00 cm, the water's absolute pressure is 2.40 × 10^5 Pa. At a second point in the pipe, the water passes through a constriction where the radius is 2.00 cm.
What is the water’s absolute pressure as it flows through this constriction?

Explanation:

The horizontal pipe is modelled after the Bernoulli's Principle. The fluid speeds of at each stage of the horizontal pipe are, respectively:

The absolute pressure of water is:

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

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