Question

Welcome to the magical world of Tom and Jerry! Tom and Jerry are up to their usual
mischief, along with Spike and his adorable son Tyke, and Jerry’s friends have decided to
visit us! Let’s delve into their world!
[For Question.1 & 2]
After a ruthless battle of wit and logic, Tom has managed to capture Jerry. Tom has put
him in a cell. But Jerry refuses to give up. Jerry sits in this cell, planning his escape. Tom
arrives, checks if Jerry is still there and then leaves. Now Jerry has to carry out his
escape plan for he knows that when Tom returns, he will be eaten. The cell is situated at
the beginning of a long straight corridor which is divided by five doors. The doors operate on different time switches so that the first, which separates the cell from the corridor,
opens every 1 minute 45 seconds, the second every 1 minute 10 seconds, the third every 2
minutes 55 seconds, the fourth every 2 minutes 20 seconds, and the fifth, which is at the
end of the corridor, every 35 seconds. Every once in a while, the five doors open simultaneously. When this happens, Tom arrives, looks down the corridor to check the cell, and
then leaves. Jerry has calculated that in making his escape it will take 20 seconds to
cover the distance between consecutive doors, which is longer than the amount of time a
door stays open. He also knows that if he stays in the corridor for longer than two and a
half minutes an alarm will sound so Jerry plans to escape in the shortest possible time.
Given that he is smart enough to keep track of all time (answer in units of 35 seconds):
Question 1:
How many units has passed when Jerry starts moving?
A. 18m 40sec B. 19m 15sec C. 19m 50sec D. Prisoner cannot escape
Question 2:
How many units pass before Tom returns do Jerry clear the last door?
A. 12m 50sec B. 13m 25sec C. 14m D. Prisoner cannot escape

Answer 1

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