two arcs of concentric circles are intercepted by the same central angle. the resulting arc length of the arc of the larger circle is 16 m and the radius of the smaller circle is 7.5 m. find the length of the corresponding arc of the smaller circle
Accepted Solution
A:
the complete question in the attached figure
Let A°-----------> the same central angle
For the larger circle length of larger circle=2*pi*r-------> 2*pi*12-----> 75.36 m
360° (full circle) has a length of------------> 75.36 m A°-----------------------------------> 16 m A°=(16)*360/75.36--------> A=76.43°
For the smaller circle length of smaller circle=2pi*r-------> 2*pi*7.5-----> 47.1 m
360° (full circle) has a length of------------> 47.1 m 76.43°-----------------------------------> X X=76.43*47.1/360-----> X=10 m ----> length arc of the smaller circle
the answer is the length arc of the smaller circle is 10 m