An aeroplane weighing 63,000 kg flies up from sea level to a height of 8000 metre

PHYSICS · Subjective · CBSE · Physics · Work and Energy · Work and Energy

Problem

An aeroplane weighing 63,000 kg flies up from sea level to a height of 8000 metre. Its engine run with pure normal octane (

\text{C}_8\text{H}_{18}

) has a 30% efficiency. Calculate the fuel cost of the flight, if octane sells at Rs. 3 per litre. Given density of octane =

0.705 \text{ g mL}^{-1}

, heat of combustion of octane =

1300 \text{ kcal mol}^{-1}

. (

g = 981 \text{ cm/sec}^2

)