Question

A right circular cylinder has a height of 1 m and a radius of 35 cm. Find its volume, area of curved surface and total area.

Answer 1

h = 1 m, r = 35 cm = 0.35 m
Volume = $\pi r^{2}h=\frac{22}{7}\times 0.35\times 0.35\times 1m^3=0.385m^2$
Area of curved surface = $2\pi rh=2\times \frac{22}{7}\times 0.35\times 1m^2=2.2m^2$
Total surface area = $2\pi r(h+r)=2\times \frac{22}{7}\times 0.35(1+0.35)m^2$
$=\frac{2\times 22\times 0.35\times 1.35}{7}{m}^2=2.97m^2$