2014 · Q71
Two light rods AB = a + b, CD = a - b are symmetrically lying on a horizontal plane. They are kept intact by two strings AC and BD. The perpendicular distance between the rods is 'a'. The length of AC is given by
Elementary MathematicsGeometry
- Aa
- Bb
- C√(a^2 - b^2)
- D√(a^2 + b^2)
Explanation
AC spans the perpendicular distance a and half the length difference b: √(a^2+b^2).