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Question
A rectangular park 358 m long and 18 m wide is to be covered with grass, leaving 2.5 m uncovered all around it. Find the area to be laid with grass.
Solution
The field is planted with grass, with 2.5 m uncovered on its sides. The field is shown in the given figure.
Thus, we have; Length of the area planted with grass `35-(2.5+2.5)=35-5=30m`
Width of the area planted with grass=`18-(2.5+2.5)=18-5=13m`
Area of the rectangular region planted with grass = `30xx13=390m^2`
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