12.A square shaped exhauster of length 3m is fitted in a wall. The length of the wall is 4m and the breadth is 5 m.Find the cost of white washing the wall, if the rate of white washing the wall is Rs. 100 per sq. m.
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area of wall=l×b
=4×5
=20m^2
area of square shaped exhauster=s×s
=3×3
=9m^2
area of wall without the square exhauster=20-9
=11m^2
cost of whitewashing if per m^2 is ₹100=11×100
=₹1100
hope this helps....
=4×5
=20m^2
area of square shaped exhauster=s×s
=3×3
=9m^2
area of wall without the square exhauster=20-9
=11m^2
cost of whitewashing if per m^2 is ₹100=11×100
=₹1100
hope this helps....
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