a park is in the from of a rectangule 80m×60m. in the center of the park there is a circular lawn.the area of the park excluding the lawn is 4646m square.find the radius of the circular lawn.
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Step-by-step explanation:
total area of r rectangular park including circular lawn= l*b
= 80*60
=4800 m²
area of square excluding lawn= 4646 m²
therefore
Area of circular lawn= 4800-4646
=154 m²
Area of circle= πr²
154=22/7*r² m
r²=154*7/22 m
r²=49 m
r=√49 m
r=7 m
radius of circular lawn=7 metre
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