V = (PI)r^2h

243 ml = PI (3cm * 3cm) * h

If you use the cm and find volume you get cubic centimeters...not milliliters... 1 cm^3 = 0.001 L = 1 mL

So with that info: 243 ml = 243 cm^3 / (3.1415 * 9 cm^2) = 8.59 cm = h

So I am assuming that by similar they mean same height since everything else is different

so V = (3.1415 * (5^2) * 8.59 = 675 mL

Cheers,

/nebulus


PS It didn't really matter here, but always watch your units...favorite way to trip people up it seems. And always try to write down exactly what you know, and what you don't, and you will usually find that you can take what you know to figure out what you don't.