Blueberries

5 children collect 4 liters of blueberries in 1.5 hours.
a) How many minutes do 3 children take 2 liters of blueberries?
b) How many liters of blueberries will be taken by 8 children in 3 hours?

Result

t =  75 min
V =  12.8 l

Solution:

$h = \dfrac{ 4 }{ 1.5 \cdot \ 5 } = \dfrac{ 8 }{ 15 } \doteq 0.5333 \ l/h/h \ \\ \ \\ t_{ 1 } = \dfrac{ 2 }{ 3 \cdot \ h } = \dfrac{ 2 }{ 3 \cdot \ 0.5333 } = \dfrac{ 5 }{ 4 } = 1.25 \ h \ \\ \ \\ t = t_{ 1 } \rightarrow min = t_{ 1 } \cdot \ 60 \ min = 75 \ min = 75 \ \text { min }$
$V = 8 \cdot \ 3 \cdot \ h = 8 \cdot \ 3 \cdot \ 0.5333 = \dfrac{ 64 }{ 5 } = 12.8 = 12.8 \ \text { l }$

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