Question

If the radius of base of cylinder is 2.8 cm and its height to 5.5 cm ,then find its curved surface area....

Answer 1

Answer:

formula is 2πr(r+h)

here,

r=2.8, h=5.5

substitute the following values

$2 \times \frac{22}{7} \times 2.8 \times (2.8 + 5.5)$

=

$2 \times 22 \times 0.4 \times 8.3$

=

$44 \times 0.4 \times 8.3$

=

$146.03$