Multiple choice

An airplane covers a distance of 900 m in 3 sec. Its speed (in miles/hour) is approximately

  1. 300 miles/hr

  2. 670 miles/hr

  3. 750 miles/ hr

  4. 900 miles/hr
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed = 900 m / 3 sec = 300 m/s. Convert to miles/hr: 300 m/s * (3600 s/hr) / (1609.34 m/mile) = 1,080,000 / 1609.34 = 671.08 miles/hr. Approximately 670.

AI explanation

First, find the speed of the airplane in meters per second using the formula speed equals distance divided by time, which gives 900 divided by 3 equals 300 m/s. To convert this to kilometers per hour, multiply by 18/5, resulting in 300 times 18/5 equals 1080 km/h. Since 1 mile is approximately 1.609 kilometers, the speed in miles per hour is 1080 divided by 1.609, which is approximately 670 miles/hr.

Keep practicing — related questions