book Maths Puzzle Numerical Ability

A 13-ft ladder is leaning against a house. The distance from the bottom of the ladder to the house is 7 ft less than the distance from the top of the ladder to the ground. How far is the bottom of the ladder from the house?

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book Other Question
10to the power of6 Using Archimedes'method of non-classical trisection, if r = pie and the DC0 = 3pie/2, what is 3(0 central angle of a circle)? Give your answer to two decimal places.