the diameter of a circular pond 17.5 M it is surrounded by a Park of wide 3.5 M find the area of the park
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Radius of the pond(inner circle)=17.5/2=8.75m
Width of surrounded park=3.5m
Radius of outer circle=8.75+3.5=12.25m
Area of ring=π(R+r)(R-r)
=22/7(12.25+8.75)(12.25-8.75)
=22/7(21)(3.5)
=22/7(73.5)
=231m^2
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