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2 March, 22:50

it takes 63 minutes for four people to paint nine walls how many minutes does it take seven people to paint four walls?

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  1. 3 March, 00:51
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    16 minutes

    Step-by-step explanation:

    If it takes 63 minutes to paint 9 walls then it means for every wall, it takes 63/9=7 minutes

    Since it is 4 people working for 7 mins, the individual rate is 4/7 minutes per person

    When we have 7 people, then the number minutes they take will be 7*4/7=4 minutes per wall

    4 min per wall for 4 walls then total time will be 4*4=16 minutes
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