the length breadth and height of a room are 5m 4m and 3m respectively find the cost of whitewashing the walls of the room and ceiling at the cost of Rs 6/metre square
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Answer:
l = 5m
b = 4m
h = 3m
CSA of cubodial room
= 2 ( lh +bh )
= 2( 5×3 + 4×3 )
= 2( 15+12)
= 2×27
= 54 m²
ceiling = lb= 5×4= 20 m²
total area = 54+20 = 74 m²
cost of white washing = rs 6 / m²
total cost of white washing walls and ceiling
= 74×6 =. rs 444
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