Question

A room is 9 m long, 7m broad and 3 m height. Find the cost of papering it Rs. 50 per sq m is

Answer 1

area of room = area of papering
area of room= 2(9*7+7*3+9*3)
2*111=222m^2
total cost=222*50=Rs1110
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Answer 2

The total cost of papering the room is Rs.11,100.

Given:

The given room is 9 m long, 7 m broad and 3 m height.

The cost of papering is Rs.50 per square m.

To Find:

The total cost of papering the room.

Solution:

The given room is 9 m long, 7 m broad and 3 m height.

The total surface area of the room including the ceiling, floor and walls would be given as:

      $\boldsymbol{\therefore Surface\:Area\:of\:the\:room=2[(9\times7)+(7\times3)+(9\times3)]}\\\\\boldsymbol{\therefore Surface\:Area\:of\:the\:room=2[63+21+27]}\\\\\boldsymbol{\therefore Surface\:Area\:of\:the\:room=2\times111}\\\\\boldsymbol{\therefore Surface\:Area\:of\:the\:room=222\:m^{2} }$

→ The cost of papering is Rs.50 per m² of area.

      $\boldsymbol{\therefore Total\:Area\:of\:Papering=50\times222}\\\\\boldsymbol{\therefore Total\:Area\:of\:Papering=Rs.11,100}$

Therefore the total cost of papering the room is equal to Rs.11,100.

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