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Question

In a circle of radius 25cm two parallel chords of the length 14cm and 48cm respectively are drawn on the same side of the centre find the distance between them.

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Solution



Given: PQ= 48 cm and RS = 14 cm Draw a line segment MN, such that it is perpendicular on both PQ and RS and it passes through centre O. We know that perpendicular from the centre on a chord divides the chord. PM= MQ = 24 cm and RN = NS = 7 cmNow, in right triangle OPM, OM = OP2 - PM2 = 252 - 242 = 625 - 576 =49 = 7 cmSimilarly in right triangle ORN, ON = OR2 - RN2 = 252 - 72 =625-49 =576 = 24 cmNow, MN = ON - OM = 24 cm - 7 cm = 17 cm The distance between the chords = 17 cm.

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