On a circle of radius 120 cm, the arc intercepted a central angle of 5π/4 . What is the length of the arc?

Answer 1

arc = 5pi/4 x 120 cm= 150 pi cm

arc = radius x radians

circle circumference = 240 pi

5pi/4 is 5/8ths of the circumference

arc= 5/8 x 240 pi =150 pi

= about 150x3.141593

= about 471.24 cm