Question

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 figure). Find the cost of polishing the tiles at the rate of 50 p per cm²

Answer 1

We have lengths of the sides of 1 triangular tile are a = 35 cm, b = 28 cm, c = 9 cm. 

∴ s = a +b + c/ 2 = 35 + 28 +9 /2 cm = 36 cm 

Cost of polishing 1 cm² = 50 p = Re 0.50 

∴ Total cost of polishing the floral design = Rs 16 × 88.2 × 0.50 

= Rs 705.60 Ans.