# Blueberries

Marie earns 3 liters of blueberries for 3.4 hours, Peter 2.4 liters for 2.9 hours.

How long have earns together one liter?

Result

t =  0.58 h

#### Solution:

$v_1 = 3/3.4 = 0.882 \ l/h \ \\ v_2 = 2.4/2.9 = 0.828 \ l/h \ \\ \ \\ t = \dfrac{ 1 \ l } {v_1 + v_2 } = \dfrac{ 1} { 0.882 + 0.828 } = 0.58 \ \text{h}$

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