2015 AMC 10B Problem 2

Below is the professionally curated solution for Problem 2 of the 2015 AMC 10B, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2015 AMC 10B solutions, or check the answer key.

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Concepts:date and time

Difficulty rating: 560

Marie does three equally time-consuming tasks in a row without taking breaks. She begins the first task at $1\!:\!00$ PM and finishes the second task at $2\!:\!40$ PM. When does she finish the third task?

3:10 PM

3:30 PM

4:00 PM

4:10 PM

4:30 PM

Solution:

The time it takes to do $2$ tasks is $100$ minutes. Thus, it takes $50$ more minutes after $2:40,$ which is $3:30.$

Thus, the correct answer is B .

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