Verified Answer :

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Distance at which the lake is located = 60 miles
Speed at which Rene traveled the entire distance = 40 miles per hour
We already know that
Speed = Distance/Time
Then
Time = Distance/speed
         = 60/40 hours
         = 3/2 hours          
         = (3/2) 60 minutes
         = (3 30) minutes
         = 90 minutes
Rene will take 90 minutes to reach the lake.

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