The width of each runway is 0. 125cm, and the actual runway width = 0.125 *1000 =125cm =1.25m..

The diameter of the innermost semicircular runway is 3.6 cm,

The actual diameter of the innermost semicircular runway =3.6* 1000=3600cm=36 meters.

The actual diameter of the outermost semi-circular runway = 36+ 1.25 * 2 * 8 = 56m.

The straight runway length is 9.6cm, and the actual straight runway length is 9.6 *100 = 9600 cm = 96 m.

1. The area of this sports ground.

=96*56+3. 14*56

=5376+ 175.84

=555 1.84 (m2)

2. The runway area of this sports ground.

= the area of the playground-[3.14 * (36/2) (36/2)+96 * 36]

=555 1.84-( 10 17.36+3456)

=555 1.84-4473.36

= 1078.48 m2

Need sand

=0. 15* 1078.48

= 16 1.772 (m3)

3.200 * (4190.77-π *15.925 *15.925-50 *15.925 * 2) = 360308.89 yuan.