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Area of Trapezium and Polygon | Area of Trapezium and Polygon Exercise 20.1

Question 2

A plot is in the form of a rectangle ABCD having semi-circle on BC as shown in Fig. If AB = 60 m and BC = 28 m, Find the area of the plot.

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Area of the plot = Area of the rectangle + Area of semi-circle Radius of semi-circle = BC/2

= 28/2 = 14m

Area of the Rectangular plot = Length × Breadth = 60 × 28 = 1680 m2

Area of the Semi-circular portion = πr2/2

= 1/2 × 22/7 × 14 × 14

= 308 m2

∴ The total area of the plot = 1680 + 308 = 1988 m2

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Question 2

A plot is in the form of a rectangle ABCD having semi-circle on BC as shown in Fig. If AB = 60 m and BC = 28 m, Find the area of the plot.

Looking to do well in your science exam ? Learn from an expert tutor. Book a free class!

Area of the plot = Area of the rectangle + Area of semi-circle Radius of semi-circle = BC/2

= 28/2 = 14m

Area of the Rectangular plot = Length × Breadth = 60 × 28 = 1680 m2

Area of the Semi-circular portion = πr2/2

= 1/2 × 22/7 × 14 × 14

= 308 m2

∴ The total area of the plot = 1680 + 308 = 1988 m2

Our top 5% students will be awarded a special scholarship to Lido.

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