Apile of coal is stored in a barrel-shaped bin whose base has a radius of 3 meters. the height of the pile measures 1.5 meters. what volume of coal is in the pile (to the nearest hundredth)?

42.41 cubic meters    
The volume of a cylinder is bh where b is the area of the base and h is the height of the cylinder. And since the area of a circle is pi r^2, we have this equation for the volume of a cylinder  
V = pi*r^2*h    
Now substitute, the known values for r and h, then calculate the result:  
V = pi*r^2*h  
V = 3.14159*3^2*1.5  
V = 3.14159*9*1.5  
V = 42.411465  
V = 42.41   
 So the volume of the coal pile is 42.41 cubic meters.

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