a car covers 20 kilometre in first half of its journey 40 kilometre in next hours and 30 kilometre in third hour calculate its average speed
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the average speed of car is 45km/hr
as
(20+40)+30/2
as 20 and 40 km are completed in one hour and 30 km in another hour.
as
(20+40)+30/2
as 20 and 40 km are completed in one hour and 30 km in another hour.
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