I realize I'll get a reply in the morning so...

Question

A squash ball must have a diameter either 0.5 mm either above or below 40 mm.

a) What is the minimum and maximum surface area of a squash ball? Express answer to nearest square millimetre.

Minimum: 4902 Maximum: 5153 mm

b)If a cube box is to be sized so that the ball fits exactly inside box, what is the minimum and maximum dimensions of box?

Answer 1

min diam = 39.5
max diam = 40.5
area = pi d62, so plug in the values for d.

Use the two values for d to get the dimensions of the box. The box's sides must equal the ball's diameter, right?

Answer 2

Thanks