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Source: 2015 AMC 10B/12B Problem 2

February 26, 2015
AMC

Problem Statement

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?
<spanclass=′latex−bold′>(A)</span>3:10 PM<spanclass=′latex−bold′>(B)</span>3:30 PM<spanclass=′latex−bold′>(C)</span>4:00 PM<spanclass=′latex−bold′>(D)</span>4:10 PM<spanclass=′latex−bold′>(E)</span>4:30 PM <span class='latex-bold'>(A) </span>\text{3:10 PM}\qquad<span class='latex-bold'>(B) </span>\text{3:30 PM}\qquad<span class='latex-bold'>(C) </span>\text{4:00 PM}\qquad<span class='latex-bold'>(D) </span>\text{4:10 PM}\qquad<span class='latex-bold'>(E) </span>\text{4:30 PM}
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