Bite-sized brain teaser to solve in a minute or less.
The Study Session
Emma needs to attend a study group meeting at 2:00 pm at the library, which is a a 15-minute drive away from her place. She also has a tutoring session scheduled for the same day at 12:30 pm. Emma must also pick up her sister's birthday cake and drop it off at her own place before heading to the library. The bakery is a 10-minute drive from the location of the tutoring session and a 5-minute drive from her place. Emma calculates she needs to add in a total buffer time of about 5 minutes to account for the time it takes to park and pick up the cake. How long can she spend at the tutoring session before Emma has to leave for the bakery?
Solution
| To calculate the time Emma can spend at the tutoring session, let's back track the plan.
In order to be at the library by 2:00 pm, Emma needs to leave her own place by 1:45 pm after dropping off the cake. The library is a 15-minute drive from her place. She needs to leave from the bakery for her place by 1:40 pm. Emma's place is a 5-minute drive from the bakery. Emma needs to leave from the tutoring session for the bakery by 1:25 pm. The bakery is a 10-minute drive from the location of the tutoring session and she needs an additional 5 minutes of buffer time. Emma can spend a total of 55 minutes at the tutoring session before she has to leave for the bakery. |
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