Question

find the circumference of circle whose diameter is 4.9 cm

Answer 1

diameter=4.9cm

radius =4.9/2cm

circumference = 2πr

=2*22/7*4.9/2

=22*0.7
=15.4cm

so circumference of circle is 15.4cm
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Answer 2

Step-by-step explanation:

d= 4.9cm

r=d/2=4.9/2

=2.45

r=2.45

• circumference of a circle=2~||r
• =2×22/7×2.45/100
• =2×11×7/10
• 22×7/10
• 154/10
• 15.4