Ahmad finishes his swim at 5:10. He swam for 35 minutes. What time did he start?
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Worked Solution
Step 1: End time = 5:10. Duration = 35 minutes.
Step 2: Subtract 35 minutes from 5:10.
10 − 35 is negative, so borrow 1 hour: 10 + 60 = 70.
70 − 35 = 35 minutes. Hours: 5 − 1 = 4.
Step 3: Start time = 4:35.
Correct answer: 4:35
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