The shaded portion in the adjoining figure shows a circular path enclosed by two concentre circles. If the inner circumference of the path is 220 m and the uniform width of the circular
path is 4.5 m find the area of the path
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Answer:
Inner circumference=2πr=220
r =220/2π =220x7/2x22=35m
width=4.5m
outer circum. 39.5m
Area of the PATH
π(R+ r) (R-r)
22/7(39.5+35) x 4.5
22 / 7.x74.5x4.5=1053.64m2
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