One day my little sister had to rush to dance class. The dance class was on the other side of the island. The trip from one side of the island to another side took my little sister a 30 minutes and she was going 15 knots per hour.How far did she travel?

Distance = Rate x Time.
Rate = 15 knots per hour.
Time = 1/2 hour

Distance is the question -D Rate is the question-15 knots per hour Time is 30 minutes.- of an hour.

D=15 x 1/2= 7 1/2.