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01 Feb 2021, 13:42
Kudos
Bookmarks
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
79% (00:57) correct
21%
(00:59)
wrong
based on 208
sessions
History
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Time
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Not Attempted Yet
How long did it take a truck to completely cross a half-mile bridge?
(1) The truck's average speed while crossing the bridge is 65 miles per hour and the truck is 40 feet long.
(2) The truck travels at a maximum speed of 85 miles per hour and a minimum speed of 63 miles per hour.
(1) The truck's average speed while crossing the bridge is 65 miles per hour and the truck is 40 feet long.
(2) The truck travels at a maximum speed of 85 miles per hour and a minimum speed of 63 miles per hour.
27 Feb 2021, 14:58
Kudos
Bookmarks
Bunuel
Typically we need distance and (average) velocity to find the time. Notice we are given the bridge is half a mile long.
Statement 1:
From this statement we can gather we may need the truck's length, so the bridge's distance alone is probably not enough to find the real distance. Either way, we have the bridge's length and the truck's length so we can find any distance the question asks for. We are also given the speed so this is sufficient.
Statement 2:
Insufficient.
Ans: A
