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A man walked 100 meters east then went back running for 40 meters west. The whole travel took 45 seconds. Find the man's speed and velocity.

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please help me

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Solving for the man's speed:

Total distance covered by the man is 100meters + 40meters = 140 meters.

Time it takes for the man is 45 seconds..

Therefore, the man's speed is 140meters/45seconds.

Speed = 3.1 meters per second.

Velocity is displacement/time.

displacement is the change in position.

For velocity of man:

Velocity = (100-40)/45

= 60/45

=1.3 meters per second.