Question
A vertical mast BM stands on horizontal ground.
It is held by two straight wires from the top M to points A and C on the ground.
A, B and C lie on a straight line with B between A and C.
Wire MA = 25 m and BA = 15 m.
Wire MC is attached at C, where BC = 9 m.
[4 marks]
It is held by two straight wires from the top M to points A and C on the ground.
A, B and C lie on a straight line with B between A and C.
Wire MA = 25 m and BA = 15 m.
Wire MC is attached at C, where BC = 9 m.
(a)Show that the height of the mast MB is 20 m.
(b)Work out the length of the wire MC.
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