#### Answer

radius = 14 in
diameter = 28 in

#### Work Step by Step

The circumference of the circle = 88 in
The circumference of the circle is given by the formula
c= $\pi$ d = 2$\pi$ r
therefore 2$\pi$ r = 88
2*$\frac{22}{7}$*r = 88
r = $\frac{88* 7}{22* 2}$ = 14 in
Therefore diameter of the circle = 2r = 2* 14 = 28 in