Question

What is the combined area of the two bases of the following cylinder?





452.16 cm2

904.32 cm2

113.04 cm2

226.08 cm2

Answer 1

what u need area of whole cylinder or only of bases

Answer 2

Okay, how do you find that?

Answer 3

area of base = area of circle
pi *r^2 but there are 2 circles so
2(pi*r^2)
r=d/2
d=12
so r= 6
(2*3.14*6*6)
=226.08

Answer 4

Okay, so now what?

Answer 5

what??
226.08 is the combined area of two circles.
what else u need

Answer 6

Sorry brain fart!

Answer 7

lol.ok no problem

Answer 8

What about the surface area of that same figure?

Answer 9

total surface area or curved surface area??

Answer 10

Total.

Answer 11

total surface area = curved surface area + area of two bases
csa=2pi *r*h
=2*3.14*6*15=565.2
565.2+area of two bases
=565.2+226.08
=791.28

Answer 12

You're so much help! Thank you!

Answer 13

no problem..
your welcome

Answer 14

Do you know anything about deminsions? Im having trouble understanding them.

Answer 15

yaa sure i will try

Answer 16

If the dimensions of the following cylinder are tripled, what factor will the volume change by?





3

9

27

81

Its the same figure as above

Answer 17

Dont we need to find the volume too?

Answer 18

no.
volume of cylinder = pi*r^2*h
if r and h is tripled
then
new formula is
pi*(3r)^2*(3h)
so the volume is increased = pi*9r^2*3h
=27 times

Answer 19

So to find the volume you would just triple everything right? Or no?

Answer 20

@driftracer305 If the dimensions of the following cylinder are tripled, what will be the volume of the new cylinder?(same figure)nI dont understand it at all!

Answer 21

Wait, got it!

Answer 22

wat u got?

Answer 23

it shld be 27 times....... he was right...... all good