# Third of an hour

How many minutes is a third of an hour? Do you know to determine a third of the lesson hour (45min)?

Result

a =  20 min
b =  15 min

#### Solution:

$a=\dfrac{ 1 }{ 3 } \cdot \ 60=20 \ \text{min}$
$b=\dfrac{ 1 }{ 3 } \cdot \ 45=15 \ \text{min}$

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