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RD Sharma Solutions Class 7 Mathematics Solutions for Properties of Triangle Exercise 15.5 in Chapter 15 - Properties of Triangle
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A ladder 3.7 m long is placed against a wall in such a way that the foot of the ladder is 1.2 m away from the wall. Find the height of the wall to which the ladder reaches.
Answer:
Let the height of the ladder reaches to the wall be h.
According to the Pythagoras theorem, we have (Hypotenuse)^2 = (Base)^2 + (Height)^2
3.72 = 1.22 + h^2
h^2 = 13.69 – 1.44 = 12.25
h = 3.5 m
Hence, the height of the wall is 3.5 m.
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