Answer:
Mass of the car = 1 ton = 1000 kg; velocity of \[car=90\,\,kmph=90\times \frac{5}{18}=25m/s\] Time = 20 s ; Power = ? We know that, \[P=\frac{Work\,\,done}{time}=\frac{K.E.}{t}=\frac{{}^{1}/{}_{2}m{{v}^{2}}}{t}\] \[\Rightarrow P=\frac{{}^{1}/{}_{2}\times 1000\times 25\times 25}{20}=15625=15.625\,\,K.W.\]
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