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Q.

The frustum cone curved surface area is 600 mm3. The upper and lower circle area of a cone is 25 and 35 mm. Find the total surface area.


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a

660mm3

b

650mm3

c

560mm3

d

660mm  

answer is A.

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Detailed Solution

Given that,
Curved surface area of a frustum cone is 600 mm3 .
The upper and lower circle area of a cone is 25mm and 35 mm.
Total surface area = π(R+r)s+A1+A2
Curved surface area = π(R+r)s A1=25mm,A2=35mm
Therefore, total surface area = 600 + 25 + 35.
TSA = 660 mm3 Hence, the correct option is 1.
 
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