Explanation:
Let 'x' hours be the time for which Jane traveled at 60 miles per hour.As the total time taken to cover 340 miles is 5 hours, Jane would have traveled (5 - x) hours at 80 miles per hour.
Distance covered at 60 miles per hour = Speed * time = 60 * x = 60x miles
Distance covered at 80 miles per hour = Speed * time = 80 (5 - x) = 400 - 80x miles
Total distance covered = Distance covered at 60 miles per hour + Distance covered at 80 miles per hour.
Therefore, total distance = 60x + 400 - 80x.
But, we know that the total distance = 340 miles.
Therefore, 340 = 60x + 400 - 80x
=> 20x = 60 or x = 3 hours.
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