Suppose that a car has passed the checkpoint, A , towards the checkpoint, B , with an average speed of 150 Km/hr and reached B at 10:35:40. 1- Express the recorded time at point B in seconds. 2- If...

Suppose that a car has passed the checkpoint,
A, towards the checkpoint,
B, with an average speed of 150 Km/hr and reached B at 10:35:40.

1- Express the recorded time at point B in seconds.

2- If the car has reached the next checkpoint,
B
at 10:35:40, what will be time that this car has passed the checkpoint,
A, if the distance between A and B is 100 Km? The time should be in hrs-min-sec format. Show all your calculation steps.