Question

A door of length 3m and breadth 2m is fitted in a wall. The length of the wall is 4.5

m and breadth of the wall is 3.5 m (see figure). Find the cost of white washing the

wall, if the rate of white washing the walls is Rs 20 per m2

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Answer 1

Answer:

Rs 315

Step-by-step explanation:

length = 4.5 m

breadth = 3.5 m

cost of washing = Rs 20 per m²

area of wall = 4.5 × 3.5

                    = 15.75 m²

15.75 m² = 20 × 15

               = 300

0.75 = 20 ×0.75

        = 15

cos of washing = 300 + 15

                          = Rs 315

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