Difference between revisions of "2021 Fall AMC 10A Problems/Problem 11"
(Created solution for 2021 AMC 10A Fall #11.) |
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Revision as of 21:40, 22 November 2021
Solution
Let the speed at which Emily walks be 42 steps per hour. Let the speed at which the ship is moving be . Walking in the direction of the ship, it takes her 210 steps, or 210/42 = 5 hours, to travel. We can create the equation: Where d is the length of the ship. Walking in the opposite direction of the ship, it takes her 42 steps, or 42/42 = 1 hour. We can create a similar equation: Now we have 2 variables and 2 equations, and we can solve for d. ~LucaszDuzMatz