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Mechanical advantage of an inclined plane = ramp length ÷ height = 10 ÷ 4 = 2.5. Effort = Load ÷ MA = 60 ÷ 2.5 = 24 lb. Option C is correct. CAST Mechanical Concepts questions often test inclined plane applications.

Energy = Power × Time = 2.5 × 12 = 30 kWh. Option C is correct. CAST Mathematical Usage often includes power–time calculations.

Volume = length × width × thickness. Thickness = 6 in = 0.5 ft. Volume in cubic feet = 24 × 15 × 0.5 = 180 ft³. Convert to cubic yards: 180 ÷ 27 = 6.67 yd³. Multiply by cost per yard: 6.67 × 120 ≈ $800. The closest option is C ($800). CAST Graphic Arithmetic often requires area/volume conversion and realistic costing. Always convert cubic feet to cubic yards before applying costs.

9.5 × 60 = 570 minutes. Option B is correct. CAST Mathematical Usage frequently includes straightforward time conversions under pressure.

The passage shows reports ensure smooth transitions and awareness of hazards. Option B is correct. CAST Reading Comprehension emphasizes workplace communication practices.