RD Sharma - Mathematics

Book: RD Sharma - Mathematics

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

Subject: Maths - Class 8th

Q. No. 12 of Exercise 20.1

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12

The floor of a building consists of 3000 tiles which are rhombus shaped and each of its diagonals are 45 cm and 30 cm in length. Find the total cost of polishing the floor, if the cost per m2 is Rs. 4.

Area of rhombus =


Area of rhombus =


Area of rhombus = 675 cm2


Area of one tile = 675 cm2


Area of 3000 tiles = 675× 3000 = 2025000 cm2


Area of toles in m2 =


Cost of tiles = 202.5× 4 = Rs 810.0


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