Skip over navigation
Funnel
Age 14 to 16
Challenge Level 
|
A plastic funnel is used to pour liquids through narrow apertures. Have you ever tried pouring a drink from a glass back into a bottle ? If we imagine a funnel as a complete cone (why isn't it?), what shape cone would use the least amount of plastic to manufacture a funnel containing a set volume?
You don't need a specified volume, but it may help to ask what proportion cone would hold a litre of liquid using the least amount of plastic. See the Hint for more help. |
 |
You may also like
Concrete Calculation
The builders have dug a hole in the ground to be filled with concrete for the foundations of our garage. How many cubic metres of ready-mix concrete should the builders order to fill this hole to make the concrete raft for the foundations?
In a Spin
What is the volume of the solid formed by rotating this right angled triangle about the hypotenuse?