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2015-06-29T15:12:18+05:30

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"The length of ladder", "the height on wall till which it reaches" and "the distance between the lower end of the ladder and the base of the wall" form a right angled triangle.

length of ladder (hypotenuse) = 6m
height on wall (altitude) = 3.6 m
distance between the lower end of the ladder and the base of the wall (base) = b

b² + 3.6² = 6²
⇒ b² + 12.96 = 36
⇒ b² = 36 - 12.96 
⇒ b² = 23.04
⇒ b = √23.04
⇒ b = 4.8m

distance between the lower end of the ladder and the base of the wall is 4.8m

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