Exercise 18B.1 Questions 1, 2, 3, 6 All EXERCISE 18B.1 1 Using 7 3.14, find the circumference of: 5 cm 8 m 1.1 km 3'm 2 Find the circumference of a circle of: a diameter 8.5 cm 6 diameter 11.3 m c radius 2.45 km 3 A cylindrical tank has radius 1.5 m. What is the circumference of its base? 6 Find the perimeter of: b 8 m 20 cm 12 m 10 cm

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