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7. A circular fishpond has a 6.4 m diameter. How many meters of fence is needed to enclose the fishpond?

A. 20.066 m
B. 20.096 m
C. 21.066 m
D 21.096 m
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Answer:

A. 20.096

P = 2πr

P = 2( 3.14 × 3.2 )

P = 2( 10.048 )

P = 20.069 m

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