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The ceiling (6m x 5m ) of the room is to be painted white in colour.The paint covers 10 sq.m per litre and can be purchased in 2 litre tins at Dhs 43.50 per litre.If two coats of paint are required , Find the cost of the paint needed?

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Answer:Given :   hall room rectangular in shape with dimensions 6m x 5m.base and height of each tile is 60cm and 50 cm respectively.2m diameter carpet is placed at the center of the hall,To Find : number of triangular tiles required for the entire room  how much area is left uncarpetedratio of area of a triangular tile to area of the carpet placed at the center of the hall.Solution:Triangular tiles are congruent  using SSS congruencebase and height of each tile is 60cm and 50 cm respectively.=> area of one tile = (1/2) * 60 * 50  =  1500 cm²hall room rectangular in shape with dimensions 6m x 5m.1 m = 100 cm6 m = 600 cm5 m = 500 cmHall Area = 600 x 500  = 300000 cm²Number of tiles required  =  300000 / 1500 = 2002m diameter carpet is placed at the center of the hall,Radius = 1 m  = 100 cmArea of circle = πr²Area of  carpet =  3.14 * 100²  = 31400  cm²= 3.14 m²area is left uncarpeted =  300000 - 31400= 2,68,600 cm²= 26.68 m²ratio of area of a triangular tile to area of the carpet placed at the center of the hall.=   30 : 3.14=   3000 : 314=   1500 : 157

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