Task: Question Answering
Input (English): Problem: the consumption of diesel per hour of a bus varies directly as square of its speed . when the bus is travelling at 50 kmph its consumption is 1 litre per hour . if each litre costs $ 50 and other expenses per hous is $ 50 , then what would be the minimum expenditure required to cover a distance of 500 km ? 
Options: a ) 800 , b ) 950 , c ) 900 , d ) 1000 , e ) 1250
Output (English): d