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The cross-section of a canal is a trapez...

The cross-section of a canal is a trapezium in shape. If the canal is 10m wide at the top 6m wide at the bottom and the area of cross-section is `72m^2` determine its depth.

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given canal is like trapezium and two parallel sides are of length 10m and 6m
area of trapezium`=1/2xx`(add of bases)`xxheight`
according to question
`72m^2=1/2xx(10m+6m)xxdepth`
depth`=9m`
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