







Painting 400 drums 
20121005 

Jordan pose la question : This cylinder is given:
Cylinder with a height of 84 cm and a diameter of 54 cm.
Question: The exterior of the drum (cylinder), except the base, is to be painted blue. calculate how many litres of paint will be needed to paint 400 drums if one litre of paint covers 8.8meters Squared.
Answer to nearest tenth of a litre. Harley Weston lui répond. 





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20121005 

Jordan pose la question : This cylinder is given:
Cylinder with a height of 84 cm and a diameter of 54 cm.
Question: The exterior of the drum (cylinder), except the base, is to be painted blue. calculate how many litres of paint will be needed to paint 400 drums if one litre of paint covers 8.8meters Squared.
Answer to nearest tenth of a litre. Harley Weston lui répond. 





Cones, pyramids, cylinders and prisms 
20120913 

Roy pose la question : I read on this page that a pyramid is a special kind of cone, but a cone is not a pyramid. Does this apply to cylinders. Is a prism a special kind of cylinder, but a cylinder is not a prism? Robert Dawson lui répond. 





A border around a pool 
20090529 

PATTY pose la question : POOL RADIUS IS 13 FEET ON THE OUTER EDGE, I WANT TO MAKE AN 18 INCH OUTSIDE BORDER AROUND THE POOL. WHAT IS THE VOLUME AROUND THE POOL. (THIS IS GOING FROM A 13 FT. RADIUS TO A 14.5 RADISU. Penny Nom lui répond. 





The ratio of the volumes of two cylinders 
20090318 

jdkaj pose la question : cylinder a has radius 1m and height 4m. cylinder b has radius 2m and height 4m. find the ratio of the volue of cylinder a to the volume of b Penny Nom lui répond. 





Shapes 
20051112 

Tonya and Hailey pose la question : MY THIRD GRADERS TEACHER HAS SENT HOME HOMEWORK ASKING FOR THEM TO FIND REALWORLD OBJECT IN MANY DIFFERENTS SHAPES A FEW HAVE US STUMPED Penny Nom lui répond. 





Surface areas 
20050511 

Jessica pose la question : How can I demonstrate to my high school students the reason for the formulas for the surface area of a prism, right cylinder, and regular pyramid, and right cone? Penny Nom lui répond. 





Gallons in a cylinder 
20041229 

Dean pose la question : I have 2 cylinders:
Cylinder A = 8'D x 12'H
Cylinder B = 10'D x 15'H
Each 1ft represents how many gallons of fluid?
Cylinder A=?
Cylinder B=? Penny Nom lui répond. 





The volume of a juice jug 
20021121 

Edward pose la question : I try to find the measurement for a juice jug. I have the height of the jug and need the jug to hold 2.5 Liter of juice. Can you help me out with the formula. Penny Nom lui répond. 





Intersection of perpendicular cylindrical surfaces 
20010731 

Charlie pose la question : Please consider two right circular cylinders, perpendicular one to the other, and of unlike radii in a 3 dimensional Cartesian space with mutually perpendicular x,y,z axes. If one cylinder is centered on the y axis with radius ra, and the other on the z axis with radius rb, then the expression for the first surface would be x^{2} + z^{2} = ra^{2}, y = any number. Likewise, the second cylinder's surface would be x^{2} + y^{2} = rb^{2}, z = any number. It is my intent to define the curve at the intersection of these two cylindrical surfaces. From sketching the conditions it appears that this intersection resembles an ellipse folded about its minor axis. Chris Fisher lui répond. 





Volume and surface area of a cylinder and a triangular prism 
20010331 

Kevin pose la question : I was wondering how do you find the volume and surface area of a cylinder and a triangular prism. Penny Nom lui répond. 

