1)
V=(3.14)(40^2)(1.3)
V=(3.14)(1600)(1.3)
V=5024(1.3)
V=6531.2
2)
Circumference of semicircle: (2*3.14*17)/2=53.38
CM to M: 4000/100=40, 700/100=7
40+10+7+34+53.38+33+68+10=255.35
Perimeter=255.35m
Area of semicircle: (3.14*17^2)/2=453.73
40*10=400m^2
68*33=2244m^2
400+2244+453.73=3097.73
Area=3097.73m^2
3)
100*75=7500
Area of semicircle: (3.14*25^2)/2=981.25
7500-981.25=6518.75
Area of car park not including the arena=6518.75m^2
4)
Meters to Centimeters: 0.4*100=40
45*40*50=90000
Centimeters to Meters: 90000/100=900
Volume=900m^3
