Question

It is required to paint a glass cylindrical chimney of height 20 m and base diameter 14 m. What is the area to be painted? [2 MARKS]

Answer 1

Formula: 1 Mark
Application: 1 Mark

$h=20m,r=7m$

The area to be painted = Curved Surface area

$\therefore$ Curved surface area

$=2\pi rh$

$=2\times \frac{22}{7}\times 7\times 20$

$=880m^2$