Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 month ago

Math help?

In 4 minutes, a conveyor belt moves 300 pounds of recyclable aluminum from delivery truck to a storage area. A smaller belt moves the same quantity  of cans the same distance in 20 minutes. If both belts are used, find how long it takes to move the cans to the storage area... How many minutes will it take. 

2 Answers

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  • Ash
    Lv 7
    1 month ago

    Conveyor belt completes the job in 4 min, 

    so in 1 min, it will finish ¼ of total work

    Smaller belt completes the job in 20 min,

    so in 1 min, it will finish ½₀  of total work

    Working together, in 1 min,  the belts will do (¼ + ½₀) of total work

    So for total work they will need 1/ (¼ + ½₀)  minutes

    = 1/(6/20)

    = 20/6

    = 3.3 min

  • ?
    Lv 6
    1 month ago

    1/(1/4+1/20)

     = 3.3333 min

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