Speed Time Distance

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Speed Time Distance

by harsh.champ » Thu Feb 04, 2010 3:25 am
A new Ducati is designed for the Indian market such that its mileage at a particular speed
follows a certain relationship with that speed. Also , the speed decreases linearly with the mass of the rider while the petrol consumption per km increases linearly with the mass of rider .Ideally , when the mass of the rider is negligible, the speed is 100km/hr and mileage is 100km/l .When the speed of the Ducati is 50 km/hr , the mileage is 50 km/l.When the speed of the Ducati is 75 km/hr , the mileage will be

(1)60
(2)67
(3)72
(4)75
(5)78

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by ajith » Thu Feb 04, 2010 5:28 am
harsh.champ wrote:A new Ducati is designed for the Indian market such that its mileage at a particular speed
follows a certain relationship with that speed. Also , the speed decreases linearly with the mass of the rider while the petrol consumption per km increases linearly with the mass of rider .Ideally , when the mass of the rider is negligible, the speed is 100km/hr and mileage is 100km/l .When the speed of the Ducati is 50 km/hr , the mileage is 50 km/l.When the speed of the Ducati is 75 km/hr , the mileage will be

(1)60
(2)67
(3)72
(4)75
(5)78

________________________
Lost a lot of time solving this question,anybody has any shortcuts??
How did u solve this? Solution please I do not mind the long way.
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