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Let the length of the ladder be L meters, and the base distance from the wall be d meters. From the triangle: sin 60° = Opposite/Hypotenuse = 15/L. √3/2 = 15/L. L = 15 × 2/√3 = 30/√3 = 10√3 m. cos 60° = Adjacent/Hypotenuse = d/L. 1/2 = d/(10√3). d = 15/√3 = 5√3 m. Correct answer: d) Length = 10√3 m, Distance = 5√3 m
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