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28. If a circle touches the side BC of a triangle ABC at P and extendedand AC at Q and R, respectively, prove thatAQ = 5 (BC + CA + AB)-3.The area of a circular play ground is 22176 cm-. Find the cost ofthis ground at the rate of 50 per metre.30. If 2x + y = 23 and 4x - y = 19, find the value of (5y – 2x) and --OR11 11Solve for x: 7+4 -7+7= 30;-4, 7.11.30/2/2.​

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