alleryA circular park of radius 20 m is to be enclosed by fencing. The length of fencing needed is
A62.8 m
B125.6 m
C40 m
D20 m
Answer & Solution
Correct answer: B. 125.6 m
1. Circumference = 2 × pi × r = 2 × 3.14 × 20.
2. = 125.6 m.
3. Hence 125.6 m.
_Source: syllabus Mathematics, Ch 11 "Areas Related to Circles", §11.2_
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