|
Un article trouvé pour ce sujet.
 |
|
|
|
|
|
|
|
|
A pile of sand |
2009-12-16 |
|
Malik pose la question :
Sand is leaking out of a hole at the bottom of a container at a rate of 90cm3/min. As it leaks out, it forms a pile in the shape of a right circular cone whose base is 30cm below the bottom of the container. The base radius is increasing at a rate of 6mm/min. If, at the instant that 600cm3 have leaked out, the radius is 12cm, find the amount of leakage when the pile touches the bottom of the container.
Harley Weston lui répond. |
|
|
|
