Question

The diameter of cylinders
is 14 cm and its height is 20 cm. Then curved surface of cylinders will be.
help me just 20 point ​

Answer 1

csa=

$2\pi \: r \: h$

2*22/7*7*20

880

Answer 2

we know,

d=14

r=14÷2=7

curved surface area=2πrh

=2×22÷7×7×20

=880.