How can I get the surface area from a cylinder when my radius is 9 and the volume is 1,458

Question

Mathematics

Kiley Lamb

30 August, 10:25

How can I get the surface area from a cylinder when my radius is 9 and the volume is 1,458

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Answers (1)

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Viviana Ingram · Answer 1

SA=2pir^2+2hpir

V=hpir^2

given

V=1458 and r=9, find h

V=hpir^2

V / (pir^2) = h

1458 / (pi9^2) = h

18/pi=h

sub

SA=2pir^2+2hpir

given

r=9

h=18/pi

SA=2pi9^2+2 (18/pi) pi9

SA=2pi81+2 (18) 9

SA=162pi+324

the surface area is 321+162pi or aprox 832.937904 square inches