A door of length 2.2 m and breadth 1.3 m is fitted in a wall. The length and breadth of the wall are 5m and 4 m respectively. Find rhe cost of painting the wall at the rate of ₹100/m².
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Answer:
Step-1: Finding the area for calculating the cost
From the given values,
Area of the wall including the door =length×breadth
=4.5×3.6=16.2m
2
Area of the door =2×1=2m
2
Area of wall excluding door =16.2−2=14.2m
2
Step-2: Finding the cost of white washing
The rate of white washing 1m
2
of the wall is Rs.20
The rate of white washing 14.2m
2
of the wall is =20×14.2=Rs.284
Hence , the rate of white washing the wall excluding the door is Rs.284.
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