Apipe has a diameter of 20cm. what is the cross-sectional area of the pipe with units m^2.

Explanation:

Since the crossection of cylinder is of circular shape

so here the crossectional area will be given as

here we know that radius of the cylinder will be

so in SI units it is given as

now we have

the area between the graph and the t axis

d) physical means can be used to separate the components of air.