Blueberries

Five children collect 4 liters of blueberries in 1.5 hours.
a) How many minutes do three children take 2 liters of blueberries?
b) Eight children will take how many liters of blueberries in 3 hours?

Correct answer:

t =  75 min
V =  12.8 l

Step-by-step explanation:

$$\begin{gathered} h=\frac{4}{1.5\cdot 5}=\frac{8}{15}\doteq 0.5333\text{l/h/h} \\ {t}_1=\frac{2}{3\cdot h}=\frac{2}{3\cdot \frac{8}{15}}=\frac{5}{4}=1.25\text{h} \\ t=t_1\to \text{min}=t_1\cdot 60\text{min}=1.25\cdot 60\text{min}=75\text{min}=75\text{min} \end{gathered}$$

$V=8\cdot 3\cdot h=8\cdot 3\cdot \frac{8}{15}=\frac{64}{5}\text{l}=12.8\text{l}$

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