A rectangular tin sheet measuring 44 cm by 22 cm is curled into a tall open cylinder by bringing its two 44 cm edges together and joining them, with no overlap. How much space does that cylinder enclose, in cubic cm? (Use π = 22/7.)

Joining the two 44 cm edges makes the 22 cm side wrap right round, so the circumference is 22 cm and the 44 cm side becomes the height. From 2π$r=22,r=22\times 7/(2\times 22)=3.5$ cm, and the volume = (22/7) $\times 3.5^{2}x44=38.5\times 44=1694$ cubic cm. The trap 3388 curls the sheet the other way, taking 44 cm round the rim and 22 cm as the height, which is a genuine cylinder but not the one described; 6776 solves π$r=22$ instead of 2π$r=22$, doubling the radius; $968=44\times 22$ is the sheet's area, a flat quantity offered where a volume was asked.