It would take 13 minutes 30 seconds.
The answer depends on the units used for 40: km per hour, miles per hour, metres per minute?
2 hours 40 minutes.
Time = Distance/Speed = 11.9/40 = 0.2975 hours.
Time = Distance/Speed = 70/40 = 1.75 hours.
At 55 MPH average, about 44 minutes.
Time = Distance/Speed = 40/70 = 0.5714.. hours = 34.3 minutes
About 8 hours and 40 minutes.
If you made no stops and went a constant 40 mph it would take about 18 minutes.
time = distance/speed 6/40 = 0.15 hours = 9 minutes
Time = Distance/Speed = 40/120 = 1/3 hours = 20 minutes.
Time = Distance/Speed = 25 miles/40 mph = 0.625 hours = 37.5 minutes.
About 4 hours 40 minutes with no stops or changes in speed.
This cannot be answered properly without knowing what your speed is.