Question

What is the total surface area of a cone whose radius r/3 and slant height 31

Answer 1

Answer:

The correct answer is πr²/9 + 31πr/3.

Step-by-step explanation:

The surface area of a cone is equal to the curved surface area plus the area of the base: πr²+πrl

where r= radius of cone, l= slant height of cone

GIVEN r = r/3, l= 31

Total surface area= π(r/3)² + π×(r/3)×31

=πr²/9 + 31πr/3

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Answer 2

Step-by-step explanation:

Radius =r/3

slant height=31

since Total Surface Area= πr(l+r)

= 22/7×r/3(31+r/3)

=. 22/21r×93+r/3