2006 AMC 8 Problem 16

Attempt Problem 16 of the 2006 AMC 8 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2006 AMC 8 solutions, or check the answer key.

All problems are used with official legal permission of the Mathematical Association of America (MAA).

16.

Before Chandra and Bob start reading, Alice says she would like to team read with them. If they divide the book into three sections so that each reads for the same length of time, how many seconds will each have to read?
64006400
66006600
68006800
70007000
72007200
Answer: E
Concepts:rateratio and proportion
Small hint:
Compare how many pages each person reads in the same amount of time.
Big hint:
A common time such as 180180 seconds makes all three page counts whole numbers.
Solution:
If all 33 individuals read the same amount of time, then the number of pages Bob, Chandra, and Alice will read will be in the ratio 4:6:94:6:9 respectively.
This means that they will read 160,160, 240,240, and 360360 pages respectively. Since they all read for the same amount of time, we can just calculate how long it takes for Bob to read his portion.
Bob will take 45⋅160=720045 \cdot 160 = 7200 seconds to read his portion.
Thus, E is the correct answer.
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