Question

The radius and height of the cylinder are in the ratio 7:2 The volume of cylinder is 8316cu.cm find the total surface area of cylinder

Answer 1

See the picture.....

Continuing:-

x=3
Thus, Radius=21cm and Height=6cm

Now,
Total surface area of cylinder=2πr(h+r)

$2 \times \frac{22}{7} \times 21(6 + 21)$
$2 \times 22 \times 3 \times 27$
$3564 \: cm {}^{2}$