Jim can assemble $b$ crates in an hour and Robert can assemble $2b$ crates in an hour. Working together at this rate

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BTGmoderatorLU: Moderator; Posts: 2554; Joined: Sun Oct 15, 2017 1:50 pmFollowed by: 6 members

by BTGmoderatorLU » Sat Nov 01, 2025 2:01 pm

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Jim can assemble $b$ crates in 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. $18b$

The OA is D

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Source: Beat The GMAT — Problem Solving | Sat Nov 01, 2025 2:01 pm

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