The area of a courtyard is 375 m². Find the cost of covering it with gravel to a height of 1 cm, if the gravel cost Rs. 6.40 per cubic metre.
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Answer:
Area of courtyard= 375 m²
height = 1cm =0.01m
Volume in this case
= area of courtyard×height
= 375 × 0.01 m
= 3.75 m³
cost per m³ = rs 6.40
cost for 3.75 m³ = 3.75 × 6.40
= Rs24
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