Question

Find the lateral surface area as in cm of the shaft of diameter 20 mm and 100 mm long

Answer 1

LSA =
$2\pi \: rh$
2× 22/7 × 10 × 100

$6285.7mm {}^{2}$

$1cm {}^{2} = 100mm {}^{2}$

$= 62.87cm {}^{2}$


Thanks