Answer:
Mercury will travel approximately 720 kilometers in 15 seconds at a speed of 48 kilometers per second.
Explanation:
To convert the speed from miles per second to kilometers per second, multiply the speed in miles per second by the conversion factor of 1.6 kilometers per mile:
30 miles per second * 1.6 kilometers per mile = <<30*1.6=48>>48 kilometers per second
To find the distance that Mercury travels in 15 seconds at this speed, multiply the speed in kilometers per second by the time in seconds:
48 kilometers per second * 15 seconds = <<48*15=720>>720 kilometers
Therefore, Mercury will travel approximately 720 kilometers in 15 seconds at a speed of 48 kilometers per second.