Question

for each pair of units listed below, circle the longer one:
inch or foot
yard or meter
meter or foot
mile or kilometer

3 fill in the blanks.
1 inch is about ________ centimeters
10 miles is about ________ kilometers

5 circle the metric unit that would be the best choice for measuring the diameter of a basketball?
meters millimeters
kilometers centimeters

7 circle the metric unit that would be the best choice for measuring the length of a swimming pool?
meters millimeters
kilometers centimeters

Explanation:

Step1: Unit conversion for 1 inch to centimeters

We know that 1 inch = 2.54 centimeters.

Step2: Unit conversion for 10 miles to kilometers

Since 1 mile ≈ 1.60934 kilometers, then for 10 miles, we multiply the number of miles by the conversion factor. So, \(10\times1.60934 = 16.0934\approx16.1\) kilometers.

Step3: Choosing the unit for basketball diameter

A basketball has a diameter that is best measured in centimeters. Meters are too large (a basketball diameter is not several meters), kilometers are extremely large (used for long - distance measurements like between cities), and millimeters are too small (a basketball diameter is not several tens of millimeters).

Step4: Choosing the unit for swimming - pool length

A swimming - pool length is best measured in meters. Kilometers are way too large (used for very long distances), millimeters are too small (a swimming - pool is not a few hundred millimeters long), and centimeters would make the number too large (e.g., a 25 - meter pool would be 2500 centimeters, which is less convenient).

Answer:

1. 2.54
2. 16.1
3. centimeters
4. meters