12 Two towers AB and PQ stand on level ground. The angles of elevation of the top of the taller tower from the top and bottom of the shorter tower are 5° and 20° respectively. The height of the taller tower is 70 metres. a Explain why ZAPJ = 15°. b Show that AB= BP sin 15° sin 95° 70 c Show that BP = sin 20° B d Hence find the height of the shorter tower, correct to the nearest metre. 20°

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