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Find the surface area of a cylinder with a diameter of 30cm and the height of 20cm.

Sagot :

r = d/2
  = (30cm)/2
r = 15cm

SA = [tex]2 \pi r (r+h)[/tex]
     = [tex]2 \pi (15cm) [15cm + 20cm][/tex]
     = [tex](30 \pi )cm [35cm][/tex]
     = [tex]1050 \pi cm^{2} [/tex]
SA = [tex]3927 cm^{2} [/tex]

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Blessy2viz
A = 2(3.14)²rh + 2(3.14)r²
R = 15cm
H = 20cm
A = 3298.67

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