1. The rate in kilometers per second is 6 kilometers per second.
2. The Saturn will travel 120km in 20secs
Rate is the relationship between a quantity and time. The rate of change in distance with time is speed.
Therefore , speed is expressed as
Distance/time
1. Assuming 1 miles = 1 kilometers
6 miles = 6 kilometers
6 miles per second = 6 kilometers per second
2. speed = distance /time
distance = speed × time
= 6 kilometers per second × 20seconds
= 120km
Therefore the Saturn will travel 120km in 20secs