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Solution supported by a picture will be help for this question.
A 100m radio mast is supported by six cables in two sets of three cables. All six cables are anchored to the ground at an equal distance from the mast. The top of set of three cables is attached at a point of 20m below the top of the mast. Each of the three lower cable is 60m long and attached at a height of 30m above hte ground. If all the cables have to be replaced, find the total length of cable required. Give answer correct to two decimal places.

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