A 100-foot work zone needs channelizing devices every 20 feet. How many devices are needed if one is placed at each end and every 20 feet between?
Correct Answer
D) 6 devices.
A 100-foot length divided into 20-foot intervals gives 5 spaces, so 6 devices are needed including both ends.
Why This Is the Correct Answer
A 100-foot length divided into 20-foot intervals gives 5 spaces, so 6 devices are needed including both ends.
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