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7 October, 11:10

it takes 545454 minutes for 444 people to paint 666 walls. How many minutes does it take 666 people to paint 777 walls?

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Answers (2)
  1. 7 October, 13:33
    0
    42 minutes

    Step-by-step explanation:

    I think this problem should read:

    "If it takes 54 minutes for 4 people to paint 6 walls. How many minutes does it take 6 people to paint 7 walls?"

    The fewer people working, the more time it takes, so to go from more people to fewer people, multiply the time to give a larger number. To go from fewer people to more people, divide the time to give a smaller number.

    The more walls, the more time it takes, so to go from fewer walls to more walls, multiply the time to give a larger number. To go from more walls to fewer walls, divide the time to give a smaller number.

    "it takes 54 minutes for 4 people to paint 6 walls"

    then

    it takes 9 minutes for 4 people to paint 1 wall (1/6 of the walls in 1/6 of the time)

    and

    it takes 36 minutes for 1 person to paint 1 wall (1/4 of the people take 4 times longer)

    then

    it takes 252 minutes for 1 people to paint 7 walls (7 walls take 7 times the time of 1 wall)

    and

    it takes 42 minutes for 6 people to paint 7 walls (6 people work 6 times faster than 1)
  2. 7 October, 15:05
    0
    230

    Step-by-step explanation:

    First calculate how long it will take one person to paint one wall.

    It will take 1/3 of the time to paint one wall. So it will take 46/3 minutes for 10 people to paint one wall.

    For only one person, it will take 10 times as long, so it will take 46/3 * 10 = 460/3 minutes for one person to paint one wall.

    So, the number of minutes it will take for one person to paint 6 walls is 460/3 * 6 = 920.

    The number of minutes it will take for 4 people to paint 6 walls is 920:4=230
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