find the diameter of a circle whose circumference is 30.8 CM
Answers
Answered by
3
Answer:
9.8 cm
Step-by-step explanation:
Circumference = 2 * 22/7 * radius
30.8 = 2 * 22/7 * r
30.8 * 7/22 = r
308/10 * 7/22 = r
9.8 = r
Radius = 9.8 cm
Answered by
3
Answer
Perimeter of circle=2πr
30.8=2πr
πr=30.8/2=15.4
22/7×r=15.4
r=15.4×7/22=1.4×7/2=0.7×7=4.9cm
Then, the diameter=2r=2×4.9=9.8cm
Step-by-step explanation:
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