the length ,breadth and height of a room are 5m,4m and 3m respectively find the cost of while washing the four wall at ₹25 per m
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Area of Four wall = 2(lh+bh)
( lb is not here since this is the Top and bottom surface which is not counted in walls)
Area = 2h(l+b) = 2×3(5+4)= 2×27 = 54 me
Cost = 54×25 = 1350Rs.
( lb is not here since this is the Top and bottom surface which is not counted in walls)
Area = 2h(l+b) = 2×3(5+4)= 2×27 = 54 me
Cost = 54×25 = 1350Rs.
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