a classroom is in the form of cuboid and is 7m long,6cm broad and 3.5m high. doors and windows occupy an area of 17 square metre. find the cost of white washing the walls at rs 1.50 per square metre.
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Given :
Length = 7 m
Breadth = 0.06 m
Height = 3.5 m
Area of 4 walls = 2h(l+b)
= 2×3.5(7+0.06)
= 49.42 m^2 .
Area occupied by Windows and door = 17 m^2 .
Area to be painted = 49.42-17 = 32.42 .
Now cost of painting = Rs.48.63
Length = 7 m
Breadth = 0.06 m
Height = 3.5 m
Area of 4 walls = 2h(l+b)
= 2×3.5(7+0.06)
= 49.42 m^2 .
Area occupied by Windows and door = 17 m^2 .
Area to be painted = 49.42-17 = 32.42 .
Now cost of painting = Rs.48.63
Anonymous:
:)
but the units are not same
These are Same
2 in metres and 1 in cm
i am talking about length breadth and height
ok wait correcting
Right now ??
very big thanks
welcome bhai
i want to know u are in which class and school
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