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Q6. a. A casting is slung from a horizontal beam by two chains 2.5 meters apart.

The lengths of the chains are 2 and 2.3 and both are hooked to the same lifting eye of the casting.

Calculate the angle made by the chains with the beam. (8)

b. Fig Q6(b) shows a rectangle EFGH, 56 cm x 33 cm, enclosed within rectangle ABCD such that angle HGC = 25°

Calculate the length of AB. (8)