The Solution.
Step 1:
We shall determine the radius (r) of the circular base of the cone by dividing its diameter by 2.
[tex]\text{radius (r)= }\frac{diameter}{2}=\frac{14}{2}=7\operatorname{cm}[/tex]
Step 2:
We shall find the vertical height of the cone by using the Pythagoras Theorem.
By Pythagoras Theorem. we have
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Step 3:
We shall state the formula for calculating the surface area of the cone.
