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30 Jan 2020, 03:53
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
87% (00:50) correct
13%
(01:32)
wrong
based on 182
sessions
History
Date
Time
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Not Attempted Yet
Jim can assemble b crates an hour and Robert can assemble 2b crates in an hour. Working together at this rate, how many crates can they assemble in four hours?
A) 3b
B) 6b
C) 8b
D) 12b
E) 18b
A) 3b
B) 6b
C) 8b
D) 12b
E) 18b
30 Jan 2020, 04:04
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Explanation:
Per hour work of both = 2b + b = 3b
in 4 hours = 3b X 4 = 12b
IMO-D
Per hour work of both = 2b + b = 3b
in 4 hours = 3b X 4 = 12b
IMO-D
03 Feb 2020, 06:07
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Let's assume that b=1, so that Jim assembles 1 crane per hour. Then, Robert assembles 2 cranes per hour. Together they manage 3 cranes per 1 hour and, consequently, 12 cranes per 4 hours. Plugging b=1 into the answer choices, we arrive at D: 12*1 = 12
Imho D
Imho D
