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?

Correct result:

t =  75 min
V =  12.8 l

Solution:

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

$V=8 \cdot \ 3 \cdot \ h=8 \cdot \ 3 \cdot \ 0.5333=\dfrac{ 64 }{ 5 }=12.8 \ \text{l}$

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