Chapter 5, Problem 18A

Interpretation Introduction

Interpretation:The most appropriate measuring unit of distance between two cities needs to be explained.

Concept Introduction:Units are part of a calculation which is used to display the results of measurement. The most widely used two systems are the English system and the metric system. In the metric system, meter, liter, and gram are used as common units of length, capacity, and weight respectively.

Answer to Problem 18A

The correct option is d.

Explanation of Solution

The unit of distance and its number representation is as follows:

  $\begin{array}{c}1\text{km}=1000\text{meter}\\ \text{1}\text{meter}=100\text{centimeter}\\ \text{1}\text{centimeter}=10,000\text{milimeter}\end{array}$

The selection of measuring units is based on the distance between two points. The distances between the two cities are large. Hence, the most appropriate measuring unit of distance between the two cities is kilometer. A kilometer is a unit that is used in the measurement of greater distances.

Conclusion

Option a, b and c is incorrect as they are used to measure a smaller distance.