Answer:
mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
the answer is (d) 57°
Step-by-step explanation:
since it's a straight angle it equals to 180°
you divide 180° from 123°
Lateral Area of a Cylinder = 2πrh
=2π x 3 x 6
=36π
Option D
The answer is 7.2368421053 .