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.