Question

The internal measure of a cuboidal room are 12m × 8m × 4m. Find the total cost of whitewashing all four walls of a room, if the cost of whitewashing is Rs. 5per m². What will be the cost of while washing if the selling of the room is also whitewashed?​

Answer 1

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• Length —» 12m

• Breadth —» 8m

• Height —» 4m

• CSA of cuboid —» 2 ( l + b ) h

—» 2 ( 12 + 8 ) 4

—» 160 m² .

• Cost of ww four walls —» 160 × 5

—» 800 rupees .

• Area of ceiling —» l × b = 96 m² .

Total area to be painted = 160 m² + 96 m²

—» 256 m² .

• Cost = 256 × 5 = 1280 rupees

Answer 2

Step-by-step explanation:

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