Three students in a relay race each completed one leg. Sara took 1 minute 52 seconds, Luke took 2 minutes 8 seconds, and Siti took 1 minute 45 seconds. The qualifying time for the relay is 6 minutes. By how many seconds did the team beat the qualifying time?
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Worked Solution
Step 1: Convert each swimmer's time to seconds.
Sara: 1 × 60 + 52 = 112 s
Luke: 2 × 60 + 8 = 128 s
Siti: 1 × 60 + 45 = 105 s
Step 2: Find the total relay time: 112 + 128 + 105 = 345 s.
Step 3: Convert the qualifying time to seconds: 6 minutes = 6 × 60 = 360 s.
Step 4: Find the difference: 360 - 345 = 15 s.
Answer: The team beat the qualifying time by 15 s.
Correct answer: 15 s
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