21. Uma has to put up a fence around her rectangular garden of length 30 m and breadth 20 m. She takes 10 min to complete fencing all the sides of the garden and comes back to the point where she started from. Find her average speed and average velocity (in m/s).
2 .Alex is running around a circular path that has a circumference of 300 m at a constant speed. He runs tuvo complete rounds in 3 min each, and in the third round, he stops midway in 1.5 min as he feels tired. Find his average speed and average velocity (in m/s).
3.A dolphin swims from one end to another in a swimming pool of length 50 m at a speed of 20 km/h and returns with a speed of 30 km/h. Find its average swimming speed (in km/h).
4. A car covers two fifths of a 150 km road with a velocity of 60 km/h east. It then continues in the same direction and covers the rest of the distance in another hour. Find its average speed and average velocity (in km/h)
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Answer:
21
Explanation:
30*20=600
600/10=60m
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