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A boy runs on a straight road from his home to a market 2.0km away with a speed of 4km/h. Finding the market closed ,he at once runs back to his home with a speed of 6km/h. Calculate his (i) average speed (ii) magnitude of average velocity and (iii) average speed of the boy in the time interval 0- 30 minutes and 0- 45 minutes.SHAREa car covers the 1st half of the distance Between two places at a speed of 40km/h and the 2nd half 60km/h. what is average speed of the car? |
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Answer» A boy runs on a straight ROAD from his HOME to a market 2 0km away with a SPEED of 4km/h Finding the market CLOSED ,he at once runs back to his home ... |
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