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Question of the day
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Question of the Day (18-Jun-20)

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The speed of a rail engine is 42 km/hr when no compartment is attached to it and the reduction in speed is directly proportional to the square root of the number of compartments attached. If the speed of the train carried by this engine is 24 km/hr when 9 compartments are attached, then what is the maximum number of compartments that can be carried by the engine so that it can move?
OPTIONS
 
 1)48
 2)49
 3)46
 4)47
 5)None of these

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