The car runs at a speed of 90 km / h for 100 km and consumes 8 liters of gasoline. The car runs at a constant speed of 25 km (1) If the efficiency of automobile is 31.25%, what is the useful work of automobile engine? (2) the useful power of automobile engine The calorific value of gasoline is 32 million J / L

The car runs at a speed of 90 km / h for 100 km and consumes 8 liters of gasoline. The car runs at a constant speed of 25 km (1) If the efficiency of automobile is 31.25%, what is the useful work of automobile engine? (2) the useful power of automobile engine The calorific value of gasoline is 32 million J / L

You're short of conditions. You don't provide the energy of gasoline