Problem 11. An airport has a moving walkway in a long corridor (of length L) designed to save passengers time. If Tom walks through the corridor (not on the moving

walkway), it takes him 150 s to reach the far end. If Tom stands on the moving walkway, it takes him 100 s to reach the far end. How long would it take Tom to reach the far end if he got on the moving walkway and walked at his normal speed relative to the walkway itself? Note that the answer does not depend upon the length L (which is given only as a variable, not as a specific number)