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Fig.(i) above shows a triangle ABC in which AC = 8 cm, BC = a cm, and angle ACB = 30⁰. Fig(ii) shows a trapezium PQRS in which PQ = 7 cm, SR = 3cm, PQ is parallel to SR and the
distance between them is d cm.
Given that the triangle and the trapezium have the same area, determine the ratio d: a.