Practicing Success
A 11 m long ladder is placed against a wall. It is inclined at an angle of 30° to the ground. The distance (in m) of the foot of the ladder from the wall is (Given √3 = 1.732)? |
19.052m 17.5m 9.526m 42.67m |
9.526m |
AC = ladder θ = angle of inclination BC = distance of foot from wall cos θ= \(\frac{BC}{AC}\) ⇒ cos 30° = \(\frac{BC}{11}\) ⇒ \(\frac{\sqrt {3}}{2}\) = \(\frac{BC}{11}\) ⇒ \(\frac{11 × 1.732}{2}\) = BC BC = 9.526m |