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A guy wire attached to a vertical pole of height 18 m is 24 m long and has a stake attached to the other end. How far from the base of the pole should the stake be driven so that the wire will be taut?

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Solution: Here; h = 24 m, p = 18 m and b = ?

From Pythagoras theorem;

b2 = h2 – p2

Or, b2 = 242 – 182

= 576 – 324 = 252

Or, b = √252 = 6√7 m

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