Outer perimeter of silo is 32 m. Concrete wall is 35 cm thick. What is diameter and area of inside floor of silo?

Correct answer:

d =  9.49 m
S =  70.67 m2

Step-by-step explanation:

32=2πr=πD d=D2h=32π235100=9.49 m
S=πr2=πd24=70.67 m2

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