Problem N 25
we know that
C=132 in
Remember that
The formula to calculate the circumference is given by
[tex]C=pi*D[/tex]
using pi=3.14
C=132 in
substitute given values in the formula
[tex]\begin{gathered} 132=3.14*D \\ solve\text{ for D} \\ D=\frac{132}{3.14} \\ D=42.04\text{ in} \end{gathered}[/tex]
The diameter D=42.04 in ( with pi=22/7 the diameter is 42 in exact)
Find out the radius r
r=D/2=42.04/2=21.02 in -----> the radius is half the diameter
Find out the area of the circle
The area is given by the formula
[tex]A=pi*r^2[/tex]
we have
r=21.02 in
pi=3.14
substitute
[tex]\begin{gathered} A=3.14*21.02^2 \\ A=1,387.38\text{ in}^2 \end{gathered}[/tex]
therefore
the answer is
d=42.04 in
r=21.02 in
A=1,387.38 in2
