If the average speed of an aeroplane is reduced by 10 km/hr, it would take 24 minutes more to go a certain distance. But if the speed is increased by 40 km/hr, it would take 12 minutes less to go the same distance. Find the average speed of the aeroplane in km/hr.

If the average speed of an aeroplane is reduced by 10 km/hr, it would take 24 minutes more to go a certain distance. But if the speed is increased by 40 km/hr, it would take 12 minutes less to go the same distance. Find the average speed of the aeroplane in km/hr. Answer

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