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+1 vote
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in Mathematics by (3.5k points)

A floral design on a floor is made up of 16 tiles which are triangular, the sides of the triangle being 9 cm, 28 cm and 35 cm (see the given figure). Find the cost of polishing the tiles at the rate of 50p per cm2.

1 Answer

+1 vote
by (5.8k points)
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Best answer

It can be observed that

Semi-perimeter of each triangular-shaped tile,

= (36 × 2.45) cm2 = 88.2 cm2

Area of 16 tiles = (16 × 88.2) cm2= 1411.2 cm2 Cost of polishing per cm2 area = 50 p

Cost of polishing 1411.2 cm2 area = Rs (1411.2 × 0.50) = Rs 705.60 Therefore, it will cost Rs 705.60 while polishing all the tiles.

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