Geometry Help

what more homework?

i should be paid for this

the balls have to be one on top of another

so the height of the cylinder is 15cm. And the width of the cylinder is 5 cm. so knowing as i'm sure you do the formula for the volume of a cylinder

that is pi r squared times h (15)

subtract from that the volume of the balls themselves

i.e. 3 times 4/3 pi r cubed if my memory serves right

and that must be the volume of the air surrounding the balls.

and i want any merit marks

Slight correction, Steve--the radius of the balls is 5 cm, not the diameter. Thus, the cylinder is actually 30 cm high and 10 cm wide to accommodate all 3 balls.