Question

Find the arc length of a semicircle where the diameter is 19 yards.

A. 19π/2
B. 19π/4
C. 19π/6
D. 19π/8

Answer 1

Arc length of a circle is given as
\[\huge l = \frac{ \theta \times 2\pi r }{360^0}\]
In case of semicircle \[\huge \theta = 180^0\]
hence arc length of semi circle =\[\huge = \frac{1}{2} \times \frac{ 180 ^0 \times 2\pi \times 19 }{360^0} =\frac{19 \pi }{2}\]
Thus option A. 19π/2 is the correct answer...

@amberk123