Explanation:
Assuming it traveled at a constant speed, you can set up a proportion
X = (3*5000)/10
X = 1500 miles
Distance traveled in 10 hours = 5,000 miles
Distance travelled in 3 hours = 5,000 * (3/10)
= 1,500 miles.
Hence the airplane travelled 1,500 miles in 3 hours.
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