This answer would be 21 because you’d just do 15 increased by 40% which gave me 21
Answer:
4 hours
Step-by-step explanation:
The speed of the first car is

While the speed of the second car is

The time it takes for each car to cover a distance d is

where
d = 960 km is the total distance covered
For car 1, the time taken is:

For car 2, the time taken is:

Therefore, the difference in time is:

Answer:
-(1/4)
Step-by-step explanation: