Question

Philadelphia, Pennsylvania, is 2,147 miles from Salt Lake City, Utah, and 2,868 miles from Portland, Oregon. What is the difference in the round-trip distances between Philadelphia and each of the other two cities? Explain whether you need an estimate or exact answer.

Answer 1

2147 x 2=4294

2868 x 2=5736

5736-4294= 1442 miles

Answer 2

Answer: 1442 miles.

Explanation:

Given : The distance between Philadelphia and Salt Lake City = 2,147 miles

⇒ Round-trip distances between Philadelphia and Salt Lake City

`=2*2147=4294\text{ miles}`

The distance between Philadelphia and Portland = 2,868 miles

⇒ Round-trip distances between Philadelphia and Portland

`=2*2868=5736\text{ miles}`

Clearly, 5736 > 4294

Difference= 5736 - 4294=1442

[Note : We have no such need to estimate.]

Hence, the exact difference in the round-trip distances between Philadelphia and each of the other two cities = 1442 miles.