Question

The length breadth and height and a hall are 5 m 6 m and 7m respectively. the hall has one door of area 1m* *0.5m.find the cost of painting the walls ( only the walls) at the rate of reaction 90 per square m.

Answer 1

Answer:

Step-by-step explanation:

dimensions of room = 5m*6m*7m

dimensions of door = 1m*0.5m

area to be painted = 2(lb+bh+hl) - lb - area of door

                               = 2(30 + 42 + 35 ) - 30 - 0.5

                               = 2(107) -30.5

                               = 214 - 30.5

                               = 183.5 m²

cost of painting wall per m² = 90 rupees

cost of painting 183.5 m² = 183.5 * 90

                                          = 16,515 rupees