## College Physics (7th Edition)

$a). 3$ $b). 246\,cm^{2}$
a). Among the inputs 12.559 cm and 5.62 cm, minimum number of significant figures is 3. So, final area should also have 3 significant figures. b). Outside area = Curved surface area + Base areas. $= 2 \times\frac{22}{7} \times r \times h + 2 \times \frac{22}{7} \times r^{2}$ where, $r=\frac{12.559}{2} cm, h=5.62 cm$ So, area $=246 \,cm^{2}$