Thursday

August 21, 2014

August 21, 2014

Posted by **martha** on Thursday, March 1, 2007 at 5:15pm.

392.5

Prinness, I think that 392.5 is pi*r^2*h, or the volume of the cylinder. This question asks for the lateral area.

Lateral area is the area of the side of the cylinder, not of one of the circles at the ends. Picture standing the cylinder on its end like a soup can, and cutting down the side from one end to the other in a vertical line. If you were to remove the ends and flatten out that side of the can, you would get a rectangle with the same height as the original cylinder and a length that is the same as the circumference of one of the ends.

This means that the formula you want to use

is Lateral area = (height)(circumference)

= h * (2*pi*r)

**Related Questions**

calculus - Find the radius and hight of cylinder with voume 64π and radius...

Geometry - If the edges of a rectangular prism are 8cm, 6cm, and the diagonal is...

geometry - find the surface area of the figure below. A cylinder which has a ...

MATH QUIZ PLS HELP!!! - 1.Find the lateral area of a cone with a radius of 7 ft...

math - A right circular cylinder is to be inscribed in a sphere of given radius...

geometry - Need help in finding -the lateral area and surface area for a ...

geometry - A right cylinder has the radius of 5 centimeters and height of 22 ...

math stumped... - is the solution of 1/3x=21? greater than or less than 21? the ...

Math - A cylinder has a height of 15 inches and a diameter of 12 inches. Use pi...

Calculus - Find the radius, volume, and hieght of the right- circlar cylindar ...