Using the subtraction operation, the difference between the trial times and average lap time and the lap time on her third trial can be obtained thus :
The question is missing key informations which are the lap time for trial 1 and trial 2. However, using an hypothetical value for the lap time, we can solve the problem thus :
- Average lap time = 34.5 seconds
- Trial time for lap 1 = 35.6 seconds
- Trial time for lap 2 = 35.00 seconds
1.) Difference between lap time for trial 1 and and average lap time :
- Trial 1 lap time - Average lap time
35.6 - 34.5 = 1.10 seconds
2.) Difference between lap time for trial 2 and and average lap time :
- Trial 2 lap time - Average lap time
35.00 - 34.5 = 1.50 seconds
3.) Lap time for third trial :
- Difference = Trial 3 lap time - Average lap time
-2.1 = x - 34.5
-2.1 + 34.5 = x
x = 32.4 seconds
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