Question

Please Help! image with the question below

Answer 1

7.5π units

Explanation:

The length of the arc is calculated as

arc = circumference of circle × fraction of circle

= 2πr ×
`(270)/(360)`

where r 9s the radius and 270° is the angle subtended at the centre.

arc = 2π × 5 ×
`\frac{3}4}`

= 10π × 0.75 = 7.5π units