The snowfall of the towns will be equal after 3 hours.
From the question, we are to determine how many hours it would take the snowfall of the towns to be equal
From the given information,
One of the towns has accumulated 4 inches of snow, and the snow depth is increasing by 5 inches every hour. Let this town be town X
Also,
Another town has accumulated 10 inches and the depth is increasing by 3 inches. Let this town be town Y
After 1 hour
Height of the snow in town X = 4 inches + 5 inches = 9 inches
Height of the snow in town Y = 10 inches + 3 inches = 13 inches
After 2 hours
Height of the snow in town X = 9 inches + 5 inches = 14 inches
Height of the snow in town Y = 13 inches + 3 inches = 16 inches
After 3 hours
Height of the snow in town X = 14 inches + 5 inches = 19 inches
Height of the snow in town Y = 16 inches + 3 inches = 19 inches
The snowfall in the towns is equal
Hence, the snowfall of the towns will be equal after 3 hours.
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