A plot of land in the form of a rectangle has dimensions 240m x 180m. A draint 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. The depth of the drailent of

A. 1.227m
B. 1.225m
C. 1.233m
D. 1.229m

A. 1.227m
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