a class room is 7 m long, 6 m broad and 3.5 m high doors and windows occupy an area of 17 square m what is the cost of white washing wallls at the rate of 1.5 per square m
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the cost is Rs. 174
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Q - A class room is 7 m long , 6 m broad and 3.5 m high doors and windows occupy an area of 17 square m . What is the cost of white washing the walls at the rate of 1.5 square m ?
- Length = 7 m
- Breadth = 6 m
- Height = 3.5 m
- Area of doors & windows = 17 m²
- Rate of whitewashing = 1.5/m²
- Total Cost of whitewashing = ?
First , finding the total area to whitewash -
We know , that only 4 walls are to be whitewashed , except door and windows ..
so ,
Now ,
Finding the Total Cost now ..
So ,
The cost of whitewashing would be 111 Rs .
________
- Area is always in unit square (u²)
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