A Circular park of 28m diameter has been construted.A 3.5m circular track outside has been developed along the park.Using algebraic formulae,find the area of the rack around the park.
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area of rack around park=pi. {R^2-r^2}
where R=14m+3.5m=17.5m
and r=14m
now area of rack=pi. {(17.5)^2-(14)^2}
=22/7 x 3.5 x 31.5 =693/2
=346.5m^2
where R=14m+3.5m=17.5m
and r=14m
now area of rack=pi. {(17.5)^2-(14)^2}
=22/7 x 3.5 x 31.5 =693/2
=346.5m^2
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