+1245 If the degree measure of an arc of a circle is increased by 20% and the radius of the circle is increased by 25%, by what percent does the length of the arc increase?
+37146 Let x = degree of arc
x/360 * pi * d = arc length
Now increase x by 1.2 and d by 1.25 (20% and 25% respectivley)
x/360 (1.2) * pi * d 1.25 = 1.5 arc length The arc length increases 50%
