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2.2 What is the payback period for investing in these high-efficiency motors? The owner of a small factory has decided to replace two 40kW AC
2.2 What is the payback period for investing in these high-efficiency motors? The owner of a small factory has decided to replace two 40kW AC motors with new high-efficiency motors, costing R8,000 each. The motors run for 6,000 hours each year at three quarters of their load. The old motors each have an efficiency of 86%, while the new high-efficiency motors have a 90% efficiency
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