Question

The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to____$(mm{)}^2$

Answer 1

Total surface area $S=2\pi rh+2\pi r^2$

$⟹S=2\pi r(r+h)=2\times 3.1416\times 2\times 12$

$⟹S=150.8c{m}^2$

$⟹S\approx 1.51\times {10}^{4}m{m}^2$