1.

A tent is in the form of a right circular cylinder surmounted by a cone. The diameter of cylinder is 24 m, the height of the cylindrical portion is 11 m, while the vertex of the cone is 16 m above the ground. The area of the canvas required for the tent is:

A.  \[\Rightarrow \]               
B.  \[\frac{r}{21-r}=\frac{4}{3}\]
C.  \[\Rightarrow \]                      
D.  \[3r=84-4r\]
Answer» B.  \[\frac{r}{21-r}=\frac{4}{3}\]


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