2006-12-04 15:31:51 · 7 answers · asked by kumaly30 1 in Science & Mathematics ➔ Mathematics
diameter * pi * height gives you the area of the side of the cylinder... you still need to add the ends, which are circles of area r^2 * pi...
so total surface area is 2*pi*r^2 + 2*r*pi*h
2006-12-04 15:38:15 · answer #1 · answered by disposable_hero_too 6 · 0⤊ 0⤋
A=2pi r^2+2pi r h
A=2(3.14)(14^2)+ 2(3.14)(14)(21)
A= 1230.88+1846.32
A=3077.2ft^2
2006-12-04 15:36:29 · answer #2 · answered by 7 · 0⤊ 1⤋
about 1846.32
You do Diameter(radiues times 2) times pi(3.14) times hieght(21), and u get the answer
2006-12-04 15:34:10 · answer #3 · answered by mrbaseball2012 2 · 0⤊ 2⤋
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2006-12-04 15:40:36 · answer #4 · answered by Anonymous · 0⤊ 0⤋
2*3.14*14*21 i.e 2*pi*r*h
2006-12-04 15:55:06 · answer #5 · answered by Red Falcon 1 · 0⤊ 0⤋
r=14
h=21
total surface area=
2pi*r*(h+r)
curved surface area=
2pi*r*h
2006-12-04 15:37:07 · answer #6 · answered by Dupinder jeet kaur k 2 · 0⤊ 0⤋
12930.79536 cubic feet
2006-12-04 15:34:58 · answer #7 · answered by Anonymous · 1⤊ 0⤋