Question

The length, breadth and height of a cuboidal room is 20 m, 12 m and 8 m

respectively. Find the total cost of whitewashing all four walls of a room, if the cost

of white washing is ₹ 7.5 per m2

. What will be the cost of whitewashing, if the

ceiling of the room is also whitewashed?
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Answer 1

Answer:

length 20m

breadth 12m

height 8m

area= CSA of cuboid + ( area of ceiling)

2l+b*h + l*b

2*20+12*8 + 20*12

area= 346m²

cost of white washing= 346*7.5

= 2595Rs