Ben starts walking along a path at 4mi/h. one and a half hours after ben leaves, his sister amanda begins jogging along the same path at 7mi/h. how long will it be before amanda catches up to ben?

2 Hours.

Step-by-step explanation:

Ben walks 1 1/2 hours at 4 mi/h so he travels 6 miles.

Let x be the number of miles Amanda jogs  so in the same time Ben has walked

x - 6 miles when Amanda catches up.

Distance = speed * time So

x = 7t  (amanda)

x - 6 = 4t   (Ben)

x = 4t + 6

x = 7t     Therefore, as they are both equal to x:

7t = 4t  + 6

3t = 6

t = 2 hours.

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