Question

the length breadth and height of a room are 5m 4 m 3 m respectivaly . find the cost of white washing the inner room and ceiling at the cost of rupees 50 per square metre

Answer 1

Answer:

l = 5m

b = 4m

h = 3m

area to be white washed = lateral surface area + base area

                                          = 2h(l +b) + lb

                                          = 2×3(5+4) + 5×4

                                          = 6×9 + 20

                                          = 54+20

                                          = 74 m ²

cost of white washing = 74×50

                                     = Rs.3700/m²