Question

A truck driver travels 20 km down the road in 5 minutes. He then reverses
and drives 12 km back down the road in 3 minutes. What is the average
velocity?

Answer 1

Answer:

A truck driver travels 20 km down the road in 5 minutes. He then reverses and drives 12 km back down the road in 3 minutes then average velocity = 60 km/hour.

Explanation:

Considering that

A truck driver travels 20 km down the road and then reverses

and drives 12 km back down the road

in this way, Total distance covered by him

                        = 20 km - 8km = 32 km

Displacement = 20 km - 12 km

                          = 8 km

Time taken = 5 + 3

                     = 8 minutes i.e, = (8/60)hours

                     = (2/15)hours

Average velocity = (Total Displacement )/(Total time taken)

Average velocity = 8 * (60/8)

                               = 60 km/hour.

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Answer 2

Hope it helps for you(｡◕‿◕｡)