A car travels first one third of total time with a speed 20 kmph, next one third of time with a speed 40 kmph and last one third of time with a speed of 60 kmph. The average speed of the car for total journey is (kmph)
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Answer:
40kmph
Explanation:
Average speed = total distance/total time
= 1/3(20+40+60)/1/3(3)
= 1/3(120)
= 40kmph
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