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### Grade 7 - Mathematics9.2 The Area of a Circular Path - II

 Example: The radius of a circular path of garden is 60 metres. A circular path of width 3.5 metres is laid around and outside the garden. Find its area. Solution: We have given that, r = 60 m and width of the path = 3.5 m. So, the radius of the outer ring = 60 + 3.5 = 63.5 m. Hence the area of the path = p (R+r)(R-r) = 22/7 * (63.5 + 60)(3.5) = 22/7 * 123.5 * 3.5 = 1358.5 sq m. Directions: Read the above example carefully and answer the following questions. Also write at least 10 examples of your own.
 Q 1: A circular path of width 17.5 m is laid around and outside the garden. Find the radius of the circular path if its area is given by 8662.5 sq m.86 m88 m70 m76 m Q 2: The radius of a circular path of garden is 'a' m. A circular path of width 'b' m is laid around and outside the garden. Find its area.bpsq units(a + b) psq units(a + b)ap sq unitsabp sq units Q 3: The radius of a circular path of garden is 77 m. A circular path of width 7 m is laid around and outside the garden. Find its area.3546 sq m3544 sq m3542 sq m3548 sq m Q 4: The radius of a circular path of garden is 64 m. Find the width laid around and outside a garden if its area is given by 5758.53 sq m.15 m13 m12 m10 m Q 5: A circular path of width 10.5 m is laid around and outside a garden. Find the radius of the circular path if its area is given by 3910.5 sq m.58 m62 m100 m54 m Q 6: The radius of a circular path of garden is 9 m. A circular path of width 3.5 m is laid around and outside the garden. Find its area.2012.5 sq m2016.5 sq m2018.5 sq m2014.5 sq m Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!