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### Grade 7 - Mathematics9.22 The Area of a Sector - II

 Example: The length of an arc of a sector whose radius is 8 cm, is 10 cm. Find its area. Solution: Given that, l = 10 cm, and r = 8 cm. Formula A = lr/2 Therefore, A = (10 * 8) / 2 A = 80 / 2 A = 40 sq cm. Directions: Read the above example carefully and answer the following questions. Also make 10 examples of your own.
 Q 1: The length of an arc of a sector whose radius is 7 cm, is 16.8 cm. Find its area.48.8 sq cm98.6 sq cm58.8 sq cm38.2 sq cm Q 2: A sector has radius is 15 cm. Find the length of an arc of the sector if its area is given by 1125 sq cm.121 cm112 cm150 cm125 cm Q 3: The length of an arc of a sector whose radius is 28 cm, is 132 cm. Find its area.1263 sq cm1346 sq cm1849 sq cm1848 sq cm Q 4: The length of an arc of a sector is 24.5 cm. Find the radius if the area of the sector is given by 128.63.10.5 cm18.5 cm13.5 cm12.5 cm Question 5: This question is available to subscribers only! Question 6: This question is available to subscribers only!