A rectangular grassy plot 110 m by 65 m has a gravel path 2.5 m wide all round it on he inside , find he cost gravelling the path a 80 paise per sq. metre. .
Area of the plot = (110 x 65) `m^2` = 7150 `m^2`
Area of the plot excluding the path = `[(110 - 5) xx (65 - 5)] m^2` = 6300 `m^2`
`:.` Area of the path (7150 - 6300) `m^2` = 850`m^2`
Cost of gravelling the path = Rs. `(850 xx 80/100) ` = Rs. 680.
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