Mathematics
NULL
Medium
Question
The radius of a semicircle is 6.3 cm. Then its perimeter is?
A
35.4 cm
B
32.4 cm
✓ Official correct answer
C
32 cm
D
30 cm
Community credibility
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A
35.4 cm
No member explanations yet for this option.
B
32.4 cm
No member explanations yet for this option.
C
32 cm
No member explanations yet for this option.
D
30 cm
No member explanations yet for this option.
Explanation
Perimeter = πr + 2r = 6.3(22/7 + 2) = 6.3 × 36/7 = 32.4 cm.