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08 Apr 2025, 09:51
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Time to Lap: 6
Laps Completed: 4
Two runners, Alex and Bella, are training on a circular track. Alex completes one lap every 90 seconds, while Bella completes one lap every 120 seconds. They both start at the same point at the same time and run continuously in the same direction.
Based on the above information, select for Time to Lap the number of minutes it takes for Alex to complete exactly one more lap than Bella, and for Laps Completed the number of laps Alex will have completed by that time.
Based on the above information, select for Time to Lap the number of minutes it takes for Alex to complete exactly one more lap than Bella, and for Laps Completed the number of laps Alex will have completed by that time.
| Time to Lap | Laps Completed | |
| 2 | ||
| 4 | ||
| 5 | ||
| 6 | ||
| 8 | ||
| 11 |
ShowHide Answer
Official Answer
Time to Lap: 6
Laps Completed: 4
08 Apr 2025, 09:51
Kudos
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Official Solution:
Alex completes 1 lap every 90 seconds. In that time, Bella completes 90/120 = 3/4 of a lap.
This means Alex gains 1/4 of a lap on Bella every 90 seconds. To gain a full lap, Alex would need 4 intervals of 90 seconds, which is 4 * 90 = 360 seconds, or 6 minutes.
Since Alex runs 1 lap every 90 seconds, in 360 seconds he runs 360/90 = 4 laps.
Correct answer:
Time to Lap "6"
Laps Completed "4"
Bunuel
Alex completes 1 lap every 90 seconds. In that time, Bella completes 90/120 = 3/4 of a lap.
This means Alex gains 1/4 of a lap on Bella every 90 seconds. To gain a full lap, Alex would need 4 intervals of 90 seconds, which is 4 * 90 = 360 seconds, or 6 minutes.
Since Alex runs 1 lap every 90 seconds, in 360 seconds he runs 360/90 = 4 laps.
Correct answer:
Time to Lap "6"
Laps Completed "4"
04 Jun 2025, 08:12
Kudos
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Alex completes 90 sec/lap and Bella completes 120 sec/lap.
Both 90 and 120 are factors of 360, 720,......
Check for 360 seconds:
Alex completes 4 laps
Bella completes 3 laps
Difference = 1 lap;
Therefore,
Time taken by Alex = 360/60 = 6 minutes;
Total laps taken by Alex = 4;
Both 90 and 120 are factors of 360, 720,......
Check for 360 seconds:
Alex completes 4 laps
Bella completes 3 laps
Difference = 1 lap;
Therefore,
Time taken by Alex = 360/60 = 6 minutes;
Total laps taken by Alex = 4;
