Chapter 1 - Measurement and Problem Solving - Learning Path Questions and Exercises - Exercises - Page 30: 50

$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 $=246 \,cm^{2}$