It is so because velocity and speed differ each other by direction. In a 100 m sprint race ,the person moves in a straight path without changing its direction where as in a 400 m race , the person moves in a lap around the race track and the direction changes as he turns according to the race track.

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Explanation:

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In the run of 100 m, its length of the displacement is 100 meters. For both the 100-m run, which implies, that speed and speed were equivalents. The distance throughout the 400-m run is 400-m, however, the riders end at the very same place, so the displacement is zero. Zero changes imply zero speed.

the statment would be a easy nonviolent one

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.