RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 20. Mensuration-I (Area of a Trapezium and a Polygon)

Subject: Maths - Class 8th

Q. No. 11 of Exercise 20.2

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The cross-section of a canal is a trapqzium in shape. If the canal is 10 m wide at the top 6 m wide at the bottom and the area of cross-section is 72 m2 determine its depth.

Length of parallel sides of trapezium = 10m and 6m

Distance between parallel sides of trapezium = x meter

Area of trapezium =

72 =

Therefore depth of river is 9m


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