To Da The radius of a circular track is 7 m. What will be the speed of a scooter, if it takes 20 seconds to complete one round of the
track?
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04
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A: 2.2 m/s
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B: 22 m/s
02
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C: 0.22 m/s
D: 022m/s
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24/05/20
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Pls help

i see they did already i am just supporting them

A

Explanation:

Firstly, recall the equation for the circumference of a circle (C=2*pi*r). Then apply the formula speed = distance/time.

Explanation:

The relation between pressure and area is as follows;

Here, P is the pressure, F is the applied force and A is the area.

There is an inverse relationship between the pressure and area.

If the area is less then the pressure is more. If the area is more then the pressure is less.

It is given in the problem that It is much easier to slice a piece of pie with the edge of a sharp knife than with the edge of a pencil. The area of the edge of a pencil is more than the area of the edge of the knife. Then, less pressure is applied in case of using the edge of the pencil.

More force is required to cut the slice of pie by using pencil.