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The internal measures of a cubiodal room are 12m x 8m x 4m. Find the total cost of whitewashing all four walls of a room. If the cost of whitewashing is ₹5 per m². what will be the cost of whitewashing if the ceiling of the room is also whitewashed. ​

User Viswas
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1 Answer

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20 votes

SOLUTION:

Let the length of the room = L = 12m

width of the room = b = 8m

Height of the room = h = 4m

• Area of the four walls of the room = Perimeter of the base x Height of the room.


= 2(l + b) * h = 2(12 + 8) * 4


= 2 * 20 * 4 = 160 {m}^(2)

  • Cost of white washing per m² = ₹5

Hence , the total cost of white washing four walls of the room ;-

  • ₹ ( 160 x 5 ) = ₹ 800

  • Area of ceiling is 12 x 8 = 96m².

Cost of white washing the ceiling.

  • ₹ (96 x 5 ) = ₹ 480.

So , the total cost of white washing ;

  • ₹ ( 800 + 480 ) = ₹ 1280 .

Hope this helps you :)

#Carry on learning# :) ..

User Rkrahl
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