Difference between revisions of "2021 AMC 12B Problems/Problem 6"
Sugar rush (talk | contribs) |
|||
| Line 14: | Line 14: | ||
--abhinavg0627 | --abhinavg0627 | ||
| + | |||
| + | ==Video Solution by Punxsutawney Phil== | ||
| + | https://youtube.com/watch?v=qpvS2PVkI8A&t=509s | ||
== Video Solution by OmegaLearn (3D Geometry - Cones and Cylinders) == | == Video Solution by OmegaLearn (3D Geometry - Cones and Cylinders) == | ||
Revision as of 18:37, 12 February 2021
Contents
Problem
An inverted cone with base radius 
and height 
is full of water. The water is poured into a tall cylinder whose horizontal base has radius of 
. What is the height in centimeters of the water in the cylinder?
Solution
The volume of a cone is 
where 
is the base radius and 
is the height. The water completely fills up the cone so the volume of the water is 
.
The volume of a cylinder is 
so the volume of the water in the cylinder would be 
.
We can equate these two expressions because the water volume stays the same like this 
. We get 
and 
.
So the answer is 
--abhinavg0627
Video Solution by Punxsutawney Phil
https://youtube.com/watch?v=qpvS2PVkI8A&t=509s
Video Solution by OmegaLearn (3D Geometry - Cones and Cylinders)
~ pi_is_3.14
Video Solution by Hawk Math
https://www.youtube.com/watch?v=VzwxbsuSQ80
See Also
| 2021 AMC 12B (Problems • Answer Key • Resources) | |
| Preceded by Problem 5 |
Followed by Problem 7 |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | |
| All AMC 12 Problems and Solutions | |
| 2021 AMC 10B (Problems • Answer Key • Resources) | ||
| Preceded by Problem 9 |
Followed by Problem 11 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AMC 10 Problems and Solutions | ||
The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions. 
