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assume that the rate of consumption of a coal by a locomotive engines varies as the square of is speed and is 1000kg per hour when d speed is 60km/hr,when in motion.If d coal cost d railway company Rs.15 per 100kg & if the other expenses of running train is Rs.12 per hour ,find a formula for the cost in paise perkilometer when the is S km/hr

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Ans: 270 paise/km
soln: consuption= (1000*15)/100 =>150
total consumption=150 + extra 12 rupees= 162rupees per 60 km
Rs.per Km= 162/60 =>2.7 rupees per km => 275 paise per km
so formula is:
(((100*15)/100)+12)*100/S
where S= speed kmph
10 years agoHelpfull: Yes(4) No(1)

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