4)
Given data:
The given speed is s=460 km/h.
The given time is t= 1/5 h.
The expression for distance is,
Substitute the given values in the above expression.
Thus, the distance traveled is 92 km.
5)
Given data:
The given speed is s= 480 km/h.
The given distance is d= 6 km.
The expression for the time is,
Thus, the value of time is 45 seconds.