RD Sharma - Mathematics

Book: RD Sharma - Mathematics

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

Subject: Maths - Class 8th

Q. No. 20 of Exercise 20.1

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20

A garden is in the form of a rhombus whose side is 30 metres and the corresponding altitudes is 16 m. Find the cost of levelling the garden at the rate of Rs. 2 per m2.

Side of rhombus = 30 m


Altitude of rhombus = 16 m


Rhombus is a type of parallelogram


Area of parallelogram = base × altitude


Area of parallelogram = 30 × 16 = 480 m2


Cost of levelling the garden = area × rate


Cost of levelling the garden = 480 × 2 = 960


Cost of levelling the garden is Rs 960


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