A 12m high electric pole has been supported with 13m long wire on the ground. How far is the tightened spot from the foot of the pole?
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Answer:
/║
/ ║
13m / ║ 12m
/ ║
/ ║
x
x²+12² = 13² (pythagorus theorem)
x²+144 = 169
x² = 25
x = √25 = 5m
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