Respuesta :

Circumference formula is 2 pi r
So it’s 2 x 22/7 x 28 which equals 176ft
Xerxis

See below ~

Here , it is given that the radius of a circle is 28 ft and we've to find it's circumference .

So,

Formula :

[tex] \sf \: C = 2πr \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: [ \red{ π = \frac{22}{7}} ][/tex]

Now ,

[tex] \Longrightarrow \sf {C = 2*π*r }[/tex]

[tex] \: \: \: \: \: \: \: \: \: \: \: \: [/tex]

[tex]\Longrightarrow \sf{C = 2* \frac{22}{ \cancel7} * \cancel{28}}[/tex]

[tex] \: \: \: \: \: \: \: \: \: \: \: \: [/tex]

[tex]\Longrightarrow \sf{C = 2* 22 * 4} [/tex]

[tex]\: \: \: \: \: \: \: \: \: \: \: \:[/tex]

[tex]\Longrightarrow \sf{C = 44 * 4} [/tex]

[tex]\: \: \: \: \: \: \: \: \: \: \: \:[/tex]

[tex]\Longrightarrow \sf{C = 176} [/tex]

Therefore , the circumference of circle is 176 ft .