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A plot of land in the form of a recta...

A plot of land in the form of a rectangle has a dimension `240 m\ x\ 180 m` . A drainlet `10 m` wide is dug all around it (on the outside) and the earth dug out is evenly spread over the plot, increasing its surface level by `25\ c mdot` Find the depth of the drainlet.

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A plot of land in the form of a rectangle has a dimension 240mx180m .A drainlet 10m wide is dug all around it (on the outside) and the earth dug out is evenly spread over the plot,increasing its surface level by 25cm. Find the depth of the drainlet.

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