exam Maths Puzzle Numerical Ability

The total surface area of a solid right cone is 108 pie(ft^2). When the slant height is twice the base radius r, draw the diagram, formulate and find the radius.

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exam Other Question
Find the values of each of the following plynomials of the given values of the variable:
-x^2-5x-6, x = -3 and x = -2

I am not getting this problem and a bit confused on how to solve this,and need some help. Thanks. i have to express to the simplest form but i am confused
2/5-y/y-2
=-3y-2
over
5(y-2)