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junior college 2 | H1 Maths
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Amy Pond
Amy Pond

junior college 2 chevron_right H1 Maths chevron_right Singapore


Date Posted: 3 years ago
Views: 327
3 years ago
Volume = 16000π = πr²h

h = 16000/r²

Total surface area,

S = Curved surfaced area + 2 x area of circular base (top and bottom same)

S = 2πrh + 2πr²

S = 2πr(16000/r²) + 2πr²

S = 32000π/r + 2πr²

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Eric's answer
22 answers (A Helpful Person)
All workings are given in the photo.

Remember that dimensions are positive, ignore all negative values of r.

Thrrefore curve of S is in 1st quadrant