SOLUTION: : A motor car travelled 3 consecutive kilometers, first kilometer at the speed of 35 kilometer per hour (kph), second kilometer at the speed of 48 kph and the third kilometer at th
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Question 951546: : A motor car travelled 3 consecutive kilometers, first kilometer at the speed of 35 kilometer per hour (kph), second kilometer at the speed of 48 kph and the third kilometer at the speed of 40 kph. Find average speed of the car in kph. Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! : A motor car travelled 3 consecutive kilometers, first kilometer at the speed of 35 kilometer per hour (kph), second kilometer at the speed of 48 kph and the third kilometer at the speed of 40 kph. Find average speed of the car in kph.
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The total time = 1/35 + 1/48 + 1/40 hours.
tt = (40*48 + 35*40 + 35*48)/(35*48*40) hours
= 5000/67200 hours
= 25/336 hours
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r = d/t = 3*336/25
r = 40.32 km/hr
