Question

A car travels that speed 60km/h for 2hrs and 120km/h for next half hour find the Average speed of the car

Answer 1

Explanation:

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Answer 2

Case 1 :

Speed of the car = 60kmph

Time travelled by the car at 60kmph = 2 hours

So distance = speed X time = 60 X 2 = 120km

Case 2 :

Speed of the car = 120kmph

Time travelled by the car at 120kmph = 1 hour

So distance = speed X time = 120 X 1 = 120km

So the total distance covered = 120 +120 = 240kmph

Total time taken = 2+1 = 3 hours

So average speed of the car throughout the journey

= Total distance covered/Total time taken

= 240/3 = 80kmph

So average speed of the whole journey is 80kmph.