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  2. A ladder is standing against the wall. If the ladder reaches a height of 12m up the wall and has its foot 5m away from it, calculate the lengthof the ladder.
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A ladder is standing against the wall. If the ladder reaches a height of 12m up the wall and has its foot 5m away from it, calculate the lengthof the ladder.

Answers (1)
S safeer

AC is the length of the ladder. By Pythagoras theorem

AC^2=AB^2+BC^2

\\AC=\sqrt{AB^2+BC^2}=\sqrt{5^2+12^2}\\=\sqrt{25+144}=\sqrt{169}=13 \ m

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