An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in 1⅔ hours, it must travel at a speed of:

300 kmph
360 kmph
600 kmph
720 kmph

Correct Answer: 720 kmph

Explanation:

Distance = (240 x 5) = 1200 km.

Speed = Distance/Time

Speed = 1200/(5/3) km/hr. [We can write 1⅔ hours as 5/3 hours]

∴ Required speed =	❨	1200 x	3	❩km/hr	= 720 km/hr.
			5

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