Final answer:
The cost of covering the playground with gravel 2 cm deep would be GHc1950.
Step-by-step explanation:
To find the cost of covering the playground with gravel, we first need to find the volume of the gravel needed. Since the thickness of the gravel is given as 2 cm (or 0.02 m), we can multiply the area of the playground (3000 m²) by the thickness to find the volume in cubic meters: Volume = Area x Thickness = 3000 m² x 0.02 m = 60 m³.
Next, we can calculate the cost of the gravel by multiplying the volume by the cost per cubic meter: Cost = Volume x Cost per cubic meter = 60 m³ x GHc32.50/m³ = GHc1950.
Therefore, the cost of covering the playground with gravel 2 cm deep would be GHc1950.