A door of length 4m and breadth 3m is fitted in a wall .The length of the wall is 16m and the breadth of the wall is 13m9cm. Find the cost of whitewashing the wall at the rate of rs.20 per meter square
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Answer:
3948.8
Step-by-step explanation:
area of rectangle =length ×breadth
length of door =4m
breadth of door =3m
area of door = l×b=4×3=12m^2
length of wall=16m
breadth of wall=13m9cm
= 13m+.09m
= 13.09 m
area of wall=16×13.09=209.44m^2
area to be painted =209.44-12
= 197.44m^2
cost of painting 1m^2=20 rupees
cost of painting the wall =197.44×20
=3948.8 rupees
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