The answer is 61.6 hours.
Let's calculate how much is the waste for running the faucet for 1 minute if for 5 minutes wastes the same amount of energy as leaving a 60-watt light bulb on for 14 hours:
5 minutes : 14 hours = 1 minute : x
x = 14 / 5 = 2.8 hours
So, the rate is 2.8 hours/minute.
Since Marco leaves the bathroom faucet running for 22 minutes, he will waste energy as leaving a 60-watt light bulb on for 61.6 hours:
22 minutes × 2.8 hours/minute = 61.6 hours.