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?

Question

anonymous · Answer

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.

here_to_help15 · Answer

490pi/245pi=2*100=200

here_to_help15 · Answer

245pi comes from the equation pi*r^2*h
pi*(7)^2*5

anonymous · Answer

So wait I am confused what would the answer be? @Here_to_Help15

here_to_help15 · Answer

Im starting to get confused lol

here_to_help15 · Answer

@nikato help plz

nikato · Answer

@EmmaDrew94  do you get how to find the volume of A

anonymous · Answer

no @nikato

anonymous · Answer

Refer to the attachment computed with Mathematica v9.

nikato · Answer

so the formula for finding the volume of a cyclinder is

$$V= (\pi r ^{2}) \times  height$$

anonymous · Answer

V= 2,415.602 @nikato

nikato · Answer

yes. but lets just leave it in terms of pi

so it'll be 245pi

anonymous · Answer

Ok. So what will be the percentage? @nikato

nikato · Answer

so B is 490 and A is 245

the difference is 245.

because A is 245 and the differnce is 245
B would be 100% bigger than A

anonymous · Answer

ok thanks @nikato

nikato · Answer

no problem