Express 30 mi/h in kilometers per hour. Round to the nearest hundredth if needed.
Answer (2)
Use the conversion factor 1 mile = 1.60934 kilometers.
Multiply 30 mi/h by the conversion factor: 30 × 1.60934 = 48.2802 .
Round the result to the nearest hundredth: 48.2802 ≈ 48.28 .
The speed in kilometers per hour is 48.28 km/h.
Explanation
Understanding the Problem We are given a speed of 30 miles per hour (mi/h) and we need to convert it to kilometers per hour (km/h). We also need to round the final answer to the nearest hundredth.
Conversion Factor To convert miles to kilometers, we use the conversion factor: 1 mile = 1.60934 kilometers.
Calculating km/h Now, we multiply the given speed in mi/h by the conversion factor to obtain the speed in km/h: 30 h mi × 1.60934 mi km = 48.2802 h km
Rounding the Result Finally, we round the result to the nearest hundredth: 48.2802 km/h ≈ 48.28 km/h.
Final Answer Therefore, 30 mi/h is equal to 48.28 km/h when rounded to the nearest hundredth.
Examples
Understanding unit conversions is essential in many real-world scenarios. For instance, when traveling to a country that uses the metric system, knowing how to convert miles to kilometers helps you understand distances on road signs and maps. Similarly, in sports, converting speeds from miles per hour to kilometers per hour is useful for comparing performance metrics across different regions. This conversion skill is also valuable in fields like aviation and meteorology, where accurate unit conversions are crucial for safety and precision.
30 miles per hour is converted to kilometers per hour using the conversion factor of 1 mile = 1.60934 kilometers. After calculating, 30 mi/h equals approximately 48.28 km/h when rounded to the nearest hundredth. Thus, the final conversion from miles per hour to kilometers per hour is 48.28 km/h.
;
