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Assume that the rate of consumption of fuel by an aircraft varies as the square of the speed and is 1000 kg per hour when the speed is 120 miles/hour. If the fuel costs the aircraft company Rs. 150 per 10 kg and if other expenses of the aircraft are Rs. 12000 per hour. Find the total cost in rupees per 10 miles, when the speed is 240 miles per hour ?

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the number are in the ratio 2:3.if 20 percent of the smaller added to 20

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Xcube = 62-32,then find X