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If Bob, working alone, can paint a certain room in 3 hours, how long does it take Bob and Richard working together to paint the room?
1) Richard, working alone, can paint the room in 2 hours
2) Richard paints at a constant rate that is 50% greater than the rate at which Bob paints
The OA is D
[spoiler]Source: Manhattan Prep[/spoiler]
1) Richard, working alone, can paint the room in 2 hours
2) Richard paints at a constant rate that is 50% greater than the rate at which Bob paints
The OA is D
[spoiler]Source: Manhattan Prep[/spoiler]
