Mathematics, 23.02.2021 22:40 leopolddc4006

Serena take 4 hours to set up the reception hall for an event. Caitlyn takes 5 hours to do the same job. How long will it take to set up the
reception hall if both of them work together? (round to the nearest
1/10):
It will take them [hours) hours working together.
Use formula: 1/A + 1/B= 1/T

Answers: 3

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Serena take 4 hours to set up the reception hall for an event. Caitlyn takes 5 hours to do the same...