The lengths of 45 ropes used at an outdoor recreational centre can be extended by 30% when
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The lengths of 45 ropes used at an outdoor recreational centre can be extended by 30% when stretched. The sum of the squares of their stretched lengths is 0.0507km2 and their natural lengths, x metres, are summarised by Σ(x − 20)2 = 1200. Find the mean natural length of these 45 ropes.
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Solution The natural lengths x of the 45 ropes is given by the equation x 20 03x This equation has t...View the full answer
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Related Book For 
Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook
ISBN: 9781108407304
1st Edition
Authors: Dean Chalmers, Julian Gilbey
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