4.16 10^8
Hope this helps *smiles*
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
Usually the easiest way to solve this is by using a calculator. Of course only if your teacher allows you too.
8. Now I deserve brainliest:)