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A man runs 100.5 m in 10.3 sec . Find his average speed up to appropriate significant figures.

A man runs 100.5 m in 10.3 sec . Find his average speed up to appropriate significant figures.

A man runs towards plane mirror at a speed of 15 m/sec. What is the speed of his image?

A man runs towards a mirror with a speed of 15 m-s^(-1) . What is the speed of his image?

A thief runs with a uniform speed of 100m/min .After one minute a policeman runs after the thief to catch him.He goes with a speed of 100m/min in first minute and increases his speed by 10m/min every succeeding minute.After how many minutes the policeman will catch the thief.