Find the missing lengths of the sides.

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

If eh = hg and hg=16, find the diameter of k

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.