Q17 of 45 Page 11

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.

Given: d1 = 45 cm


d2 = 30 cm


To find: cost of polishing the floor.


Formula Used:


Area of rhombus = 1/2 × d1 × d2


Explanation:


For the given values,


Area of rhombus = 1/2 × 45 × 30


= 675 cm2


Area of one tile = 675 cm2


Area of 3000 tiles = 675× 3000 = 2025000 cm2


Area of tiles in m2 =


Cost of polishing 1 m2 = Rs 4


Cost of polishing 202.5 m2 = 202.5 × 4


= Rs 810.0


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