Question

Cylinder A has a radius of 12 inches and a height of 6 inches. Cylinder B has a volume of 648π. What is the percent change in volume between cylinders A and B?

Answer 1

Cylinder B is 50% smaller than cylinder A.

Cylinder B is 25% smaller than cylinder A.

Cylinder B is 150% bigger than cylinder A.

Cylinder B is 200% bigger than cylinder A.

Answer 2

@dan815 @mathstudent55 @Nurali

Answer 3

@CrashOnce pls help!

Answer 4

ok

Answer 5

cool!

Answer 6

so first we need the volume of the first cylinder and use the volume of a cylinder formula : (pi x r^2) x height

Answer 7

so what does that give you

Answer 8

Yup!

Answer 9

pi x r^2 idk could you help a little more ill BRB

Answer 10

pi r^2 = pi times square of the radius
so it should be (with the height)
pi x 12^2 x 6
=144x6 pi
=864 pi
do you follow?

Answer 11

ok back

Answer 12

ok so pi x 12^2 x 6 is the problem tight

Answer 13

@CrashOnce ?

Answer 14

that is the volume of cylinder A

Answer 15

Now you have to compare it to the volume of cylinder B

Answer 16

its 37.68

Answer 17

no

Answer 18

the difference

Answer 19

atualy got 8,518.69

Answer 20

so you get the value of cylinder A minus cylinder B
what is that?

Answer 21

pi x 12^2 x 6 <-- when i did this

Answer 22

so 100%? for A

Answer 23

keep it in pi form

Answer 24

no

Answer 25

whats 864-648

Answer 26

hum well ill try it again

Answer 27

its 216 so 200%

Answer 28

wait dont rush

Answer 29

kk

Answer 30

we are finding the decrease so you have to divide the difference (216) by the larger volume (a) or 864

Answer 31

so do 216/864

Answer 32

ok so i got .25

Answer 33

yup B

Answer 34

because .25 is basically 25%

Answer 35

nice so 25%!

Answer 36

thnx!

Answer 37

ya np c:
CO