We know that
the area A of the circular cross section of the pipe is
A=pi*r²
D=20 cm------------- > r=D/2=20/2=10 cm
then
A=pi*10²=100*pi cm²
the answer is A=100*pi cm²
A = pi r^2
A = 3.14 x (5.5)^2
A = 94.985
answer
<span>94.985 m^2</span>
Answer:
4
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
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