15 men can finish a piece of work in 40 days. How many more men should be added so that the work will be finished in 30 days?
2 answers:
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Since the Power is directly proportional to the velocity, their ratio 
is constant.
<span>Therefore </span>
which is a proportion:
500 : 1000 = x : 1728
that can be easily solved:
x = (500×1728)/1000 = 864kW
<span>Therefore </span>
500 : 1000 = x : 1728
that can be easily solved:
x = (500×1728)/1000 = 864kW