(a)

Inside width of lane track is meters.

Width of each lane is meters.

Distance from the outside edge of Lane to outside edge of Lane is meters.

Draw a diagram using above information.

Diameter of the circle is .

Radius of the circle .

Here the angle is .

Arc length of a circle : .

Substitute and in .

Length of the outside edge of Lane in the curve meters.

(b)

The distance from the inside edge of Lane to the inside edge of Lane is

Here the angle is .

Substitute and in .

.

The distance from the inside edge of Lane to the inside edge of Lane is .

Here the angle is .

Substitute and in .

Inside edge of Lane 7 is meter longer than the inside edge of Lane 3 in the curve.

Inside edge of Lane 7 is meter longer than the inside edge of Lane 3 in the curve.