Question

find the circumference of a circle whose diameter is 4.9 m

Answer 1

diameter=4.9
radius=d/2=4.9/2
                   =2.45

circumference=2×22/7×radius
                         =[by multiplying 2 and 22]44/7×2.45
=15.75m

Answer 2

Here ,d=4.9 cm
therefore R=2.45cm.
therefore c= 2πr
=2×22/7×2.45
=154cm Ans.
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