Assume that the distance that a car runs on 1 L
of petrol varies inversely as the square of the
speed at which it is driven. It gives a run of
25 km/L at a speed of 30 km/h. At what speed
should it be driven to get a run of 36 km/L?
(a) 12.5 km/h (b) 25 km/h (c) 30 km/h
(C) 30 km/h (d) 40 km/h
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Answer:
40 km/h this is the correct answer
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