The length, breadth and height of a room are 4 m, 3 m and 7 m respectively. Find the coast of white washing the walls of the roo
m and the ceiling at the rate of $6 per m².
1 answer:
Required area = lb + 2 × h ( l + b)
= 4 × 3 + 2 × 7 (4 + 3)
= 12 + 14 × 7 = 12 + 98 = 110 m²
Cost of white-washing at the rate of $6/m²
= $ 110 × 6 = $ 660
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