Engineering Board Exam Reviewer · Angles and Angle Measurement · medium

Find the angle in mils subtended by a line 20 yards long at a distance of 4000 yards.

  1. 5.09 mils
  2. 4.07 mils
  3. 6.28 mils
  4. 3.18 mils

Answer

A. 5.09 mils

Solution

=20/4000=0.005 rad. Since 6400 mils =2π rad, 1 rad =6400/2π 1018.59 mils. 0.005×1018.59 5.09 mils.

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  3. The angle subtended by an arc is 15 arcminutes. If the radius of the circle is 60 cm, find the length of the arc.
  4. Find the number of degrees in 5π/6 radians.
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