3. To determine the width of a river.chain line PQR was laid across it, the points Q and R being on two sides of niver From point S, 60m from Q on line QS, which was at right angles to PQ, the bearings of points Rand P and were found to be 280 and 190 respectively. If the distance PQ was 32 m,determine the distance OR and draw the sketch. (N/D 2012)
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it can be solved by the equation formed in the question and most probably it can be done by Pythagoras theorem
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