Question

11.Find the radius of a circle whose circumference is 154cm

( take π= 22

7)

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Answer 1

Answer:

12.25cm

Step-by-step explanation:

circumference of circle = 2πr

154 = 2×22÷7

r= 154 ×7 ÷2×22

r= 7×7÷2×2

r= 49÷4

r= 12.25cm

Answer 2

Answer:

circumference of a circle is 154cm = 2 pie r

so we know, pie means 22/7 = 3.14285

therefore , 2 pie r =154

                  pie r =154 / 2 = 77

                  r = 77 / pie = 77 / 3.14285

                  r = 24.500055 cm