Question

Find the length of the arc.

Answer 1

1st option

Explanation:

The length of the arc is calculated as

arc = circumference of circle × fraction of circle

= 2πr ×
`(210)/(360)`

= 2π × 13 ×
`(21)/(36)`

= 26π ×
`(7)/(12)`

=
`(26\pi (7))/(12)`

=
`(182\pi )/(12)`

=
`(91\pi )/(6)`