Gavin spend 35 minutes in reading.
What is Unitary Method?
Unitary method is a process by which we find the value of a single unit from the value of multiple units and the value of multiple units from the value of a single unit.
Gavin spent 1 hour 35 minutes less than Lucas
Lucas spent 47 minutes less than Pete.
Pete spent 3 hours reading.
Since, pete spent 3 hours. So, Lucas spent
= 3 hours or (180 minutes) - 47 minutes
= 2 hours 13 minutes.
Now, Gavin spent = 2 hrs 13 minutes - 1 hour 35 minutes
= 38 minutes
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