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Question

A room is rectangular in shape and has a flat roof It is 10 m wide 13 m long and 5 m high It is to be painted inside and outside and on the floor but not on the ceilling then the total area to be painted is


A
360 m2
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B
460 m2
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C
490 m2
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D
590 m2
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Solution

The correct option is D 590 $$ \displaystyle m ^{2} $$
Given the length , breadth and height of rectangular room is 13 m,10 m and 5 m 
Then area of inner wall and outer wall and floor =$$4(l\times h+b\times h)+l\times b=4(10\times 5+13\times 5)+13\times 10=460+130=590 m^{2}$$ 

Mathematics

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