The radian measure of central angle is 0.8 radians
<em><u>Solution:</u></em>
Given that we have to find the radian measure of central angle
From given figure in question,
Arc length = 60 units
Radius = 75 units
<em><u>The radian measure of a central angle θ of a circle is given as:</u></em>
Where,
"r" is the radius of circle
"s" is the length of arc
= central angle in radians
<em><u>Substituting the known values,</u></em>
Thus radian measure of central angle is 0.8 radians