alleryStart learning →A 20 m ladder reaches a point 10 m up a vertical wall. What angle does it make with the ground?
A60°
B30°
C45°
D90°
Answer & Solution
Correct answer: B. 30°
Sine of the angle is 10 divided by 20, which is 1/2, so the ladder is inclined at 30° to the ground.
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