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प्रश्न
A rectangular plot measure 125 m by 78 m. It has gravel path 3 m wide all around on the outside. Find the area of the path and the cost of gravelling it at` ₹ 75 per m^2`
उत्तर
The plot with the gravel path is shown in the figure.
Area of the rectangular plot=`lxxb`
Area of the rectangular plot=`125xx78=9750m^2`
Length of the park including the path=`125+6=131m`
Breadth of the park including the path=`78+6=84`
Area of the plot including the path
=`131xx84`
=`11004m^2`
Area of the path=`11004-9750`
=`1254m^2`
Cost of gravelling `1m^2` of the path =Rs 75
Cost of gravelling`1254 m^2` of the path=`1254xx75`
=Rs `94050`
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