# Evening shift

While working the evening shift, Officer K took 8 hours to complete a task at his work station and
Officer M took 10 hours to complete the same task at his work station. How many hours would it take
Officer K and Officer M to complete the same task working together, each working at his own work
station?

Result

t =  4.444 h

#### Solution:

$t=\dfrac{ 1 }{ \dfrac{ 1 }{ 8 } + \dfrac{ 1 }{ 10 } }=\dfrac{ 40 }{ 9 } \doteq 4.4444 \doteq 4.444 \ \text{h}$

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