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20. Mensuration-I (Area of a Trapezium and a Polygon)
Home · Class 8 · Maths · Ref. Book · 20. Mensuration-I (Area of a Trapezium and a Polygon)
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Q16 of 47 Page 20

Find the area of the field in the form of a rhombus, if the length of each side be 14 cm and the altitude be 16 cm.

Side of rhombus = 14 cm


Altitude of rhombus = 16 cm


Rhombus is a type of parallelogram


Area of parallelogram = base × altitude


Area of parallelogram = 14 × 16 = 224 cm2


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14

Find the area of a rhombus, each side of which measures 20 cm and one of whose diagonals is 24 cm.

15

The length of a side of a square field is 4 m. What will be the altitude of the rhombus, if the area of the rhombus is equal to the square field and one of its diagonal is 2 m?

17

The cost of fencing a square field at 60 paise per metre is Rs. 1200. Find the cost of reaping the field at the rate of 50 paise per 100 sq. metres.

18

In exchange of a square plot one of whose sides is 84 m, a man wants to buy a rectangular plot 144 m long and of the same area as of the square plot. Find the width of the rectangular plot.

Questions · 47
20. Mensuration-I (Area of a Trapezium and a Polygon)
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