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Svetradugi [14.3K]
3 years ago
9

A window washer has a 15-foot extension ladder. how far away from the building should the foot of the ladder be placed to reach

12 feet up the building?
Mathematics
1 answer:
Alinara [238K]3 years ago
4 0
This is the concept of application of  geometry; the distance that the ladder should be placed will be given by Pythagorean theorem.
thus;
c^2=a^2+b^2
where, c=hypotenuse, a and b are the legs
hence;
15^2+12^2+b^2
b^2=15^2-12^2
b^2=225-144
b^2=81
getting the square root of both sides;
b=sqrt81
b=9
therefore the ladder should be placed 9 feet from the wall for it to reach 12 feet up the building

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