Which Units to Use for Timing a 100-Meter Race

Rosa's Dilemma

Rosa is trying to figure out which units to use to time her 100-meter race. She wants to make sure she uses the most appropriate unit to accurately measure her race time. Let's help her make the right decision by considering the options:

The Options:

A. Hours

B. Seconds

C. Kilograms

D. Minutes

Looking at the choices, it's clear that Rosa's decision should be based on the nature of the race and the need for precision. Let's break down the options:

A. Hours: Using hours to time a 100-meter race would not be practical. Hours are a much larger unit of time measurement and would not provide accurate timing for such a short-distance race.

B. Seconds: Seconds are a smaller unit of measurement and are commonly used to time races, especially short-distance sprints like a 100-meter race. Using seconds would allow for precise timing and better accuracy in measuring Rosa's race time.

C. Kilograms: Kilograms are a unit of mass, not time, so using kilograms to time a race would not make sense in this context.

D. Minutes: While minutes are a smaller unit compared to hours, they are still too large to accurately time a short-distance race like the 100-meter sprint. Using minutes would result in less precise timing compared to using seconds.

The Best Choice:

Considering the nature of the race and the need for accurate measurement, Rosa should use Seconds to time her 100-meter race. Seconds are the most appropriate unit for timing a short-distance sprint like the 100-meter race, providing precise measurements and allowing for fair competition.