Adoor length 2 metre and breadth one metre is fitted in the wall the length of the wall is 4.5 m and the breadth is 3.6 m find the cost of the quiet washing in the world if the rate of the white washing is the in the wall is 20 rupees per metre square
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Area of The remaining portion (the wall)= area of the door - area of the wall
hence,
Area of wall = l×b
= 4.5×3.6
=16.2m sq.units------(1)
Area of the door= l×b
= 2×1
= 2m sq.units-----------(2)
Area of the remaining portion= 1-2
= 16.2m-2m
=14.2 m sq.units
*Step-2*
Cost of whitewashing 1m sq. of the wall= ₹20
Cost of whitewashing 14.2msq.units= 14.2×₹20
=₹284
Therefore, the cost of whitewashing the wall is ₹284.
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