A Door of length 2 m and breadth 1m is fitted in a wall. the length of the wall is 4.5 M and breadth is 3.6 M so on figure alongside find the cost of whitewashing the wall if the rate of whitewashing the wall is rupees 20 per metre square
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DOOR:
length = 2 m
breadth = 1 m
Area= 2×1 = 2 m
WALL:
length = 4.5 m
breadth = 3.6 m
Area = l×b
=4.5×3.6
=16.20 sq. m
Area of white washing
= Area of wall - Area of door
=16.20 - 2
=14.20 sq. m
Cost of 1 sq. m = Rs. 20
Cost of white washing 14.20 sq. m = 20×14.20
= Rs. 284
length = 2 m
breadth = 1 m
Area= 2×1 = 2 m
WALL:
length = 4.5 m
breadth = 3.6 m
Area = l×b
=4.5×3.6
=16.20 sq. m
Area of white washing
= Area of wall - Area of door
=16.20 - 2
=14.20 sq. m
Cost of 1 sq. m = Rs. 20
Cost of white washing 14.20 sq. m = 20×14.20
= Rs. 284
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