Question

A cylindrical pillow has a diameter of 30 cm and a height of 40 cm. It is 80% filled with spherical foam pellets, each with a radius of 3 cm.



Approximately how many pellets are in the pillow?

Use 3.14 to approximate pi and express your answer to the nearest whole number.

Answer 1

@welshfella

Answer 2

is the answer 200 pellets

Answer 3

Calculate the total volume of the cylinder.

\[\pi*r^{2}*h = Volume~cylinder \]

Then multiply this by 0.8 ~ 80% to find the volume occupied by the pellets.

\[\pi*r^{2}*h*0.8 = volume~occupied~by~pellets \]


now calculate the volume a sphere you know the radius 3cm

\[\frac{ 4 }{ 3 }\pi*r^{3} = volume~of~a~sphere \]

Answer 4

is the answer 200 yes or no that is my answer

Answer 5

what do you get fo the volume of the cylinder * 0.8?

Answer 6

we will walk you through it but it's against OS code of conduct to give direct answers

Answer 7

do not know

Answer 8

?? you must have worked that out?

Answer 9

you had to in order to get an answer

Answer 10

greatlife gave you the formula

Answer 11

22608

Answer 12

yes tahts correct

Answer 13

22608/113.04=200

Answer 14

now you need to divide that by the valume of one pellet , right?

Answer 15

yes

Answer 16

so 200 is the answer

Answer 17

it is . You should have more confidence in yourself.

Answer 18

I think you are more able than you think you are.

Answer 19

I have more questions

Answer 20

It is against the rules to give a direct answer but I always conffirm an answer. I dont see wht's wrong with that if the questioner does some calculations themself.