I am assuming you want the answers in hours BTW.
Distance = Rate × Time
Let's calculate the distances for each case:
Rate = 40 kph, Time = 3.5 hrs:
Distance = 40 kph × 3.5 hrs = 140 kilometers
Therefore, the distance traveled at a rate of 40 kph for 3.5 hours is 140 kilometers.
Rate = 30 kph, Time = 15 minutes:
First, we need to convert the time from minutes to hours. Since there are 60 minutes in an hour, 15 minutes is equal to 15/60 = 0.25 hours.
Distance = 30 kph × 0.25 hrs = 7.5 kilometers
Therefore, the distance traveled at a rate of 30 kph for 15 minutes is 7.5 kilometers.