A door of length 3m and breadth 1m is fitted on a wall of length 30 metre and breadth 5m find the area of the wall and also find the cost of white washing the wall and the door at the rate of rupees ₹20m² and Rupees ₹15m² respectively
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Step-by-step explanation:
GIVEN
L OF DOOR=3M
B OF DOOR=1M
AREA=L X B
=3*1
=3meter square
now
L OF WALL=30M
B OF WALL=5M
AREA OF WALL =AREA OF WALL - AREA OF DOOR
= 150M SQUARE - 3M SQUARE
=147M SQUARE -----------( 1 )
COST OF WASHING DOOR =20 PER METER SQUARE
= 20*3
=₹60----------( 2 )
COST OF WASHING WALL =₹15 PER METER SQUARE
=147*15
=₹2205-----------( 3. )
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