Question

Cylinder A has a radius of 7 inches and a height of 5 inches. Cylinder B has a volume of 490π. What is the percent change in volume between cylinders A and B?

Cylinder B is 50% smaller than cylinder A.

Cylinder B is 75% bigger than cylinder A.

Cylinder B is 150% smaller than cylinder A.

Cylinder B is 100% bigger than cylinder A.

Answer 1

Cylinder A = 769.69
Cylinder B = 490

I don't know what to do after that

Answer 2

No that is incorrect as Cylinder B would be 490 x (pi).

Answer 3

Multiple 490 and pi what do u get

Answer 4

1538.6

Answer 5

Ok so now Cylinder A= 769.69
Cylinder B= 1538.6
Since they are saying in the answer Cylinder B is ?% to Cylinder put 1538.6/769.69

Answer 6

Oh wait I'm sorry put it the other way

Answer 7

so 50%

Answer 8

but why do you do 490 * pi ?

Answer 9

o nevermind

Answer 10

didn't see that it in the question :p

Answer 11

thanks

Answer 12

Wow I'm sorry got myself mixed Cylinder B is twice the size of Cylinder A

Answer 13

I think it's D actually

Answer 14

Yea 100%

Answer 15

769.69 / 1539.38 = 0.5
0.5 * 100 = 50
So A is 50% smaller or B is 100% larger

Answer 16

exactly

Answer 17

thanks