In a pie chart representing the data for favourite subject of 400 students, if 3/8 of circle is covered by sector‘Maths', the central angle for this sector will be:
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construct the following angles 75
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π r^2=360°
(3/8) π r^2=360×{(3/8)πr^2/(πr^2)
=360×3/8=45×3=135° Ans
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