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algebra.math

posted by on .

Can someone help me with this word problem.

How far up a wall will an 11m ladder reach, if the foot of the ladder must be 4m from the base of the wall? Round your answer to the nearest tenth.

  • algebra.math - ,

    The ladder will form a right-angled triangle with the wall, so use Pythagoras

    x^2 + 4^2 = 11^2

    etc

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