9. A door of length 4m and breadth 3m is
fitted in the wall. The length of the wall is 15.4
and width is 12.3m. find the remaining area
of the wall. Also find the Cost of whitewashing
the wall at the rate of 220 per me.
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Answer:
Door area = 4*3=12m²
Area of wall=15.4*13.6=209.44m²
Remaining area= 209.44m² -12m²
=197.44m²
Cost of whitefinishing = 197.44m²×20
=3948.80 m²
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