perplexus.info :: General : The test of the suits

The test of the suits (Posted on 2005-06-07)

An engineer must test three space suits in two test chambers. Each suit must be tested for 1 hour at each of two pressures.

He takes 10 minutes to load a suit in a chamber, set the pressure, and start the test; 4 minutes to change the pressure in the chamber; and 10 minutes to unload a suit from a chamber.

Knowing that each chamber could contain only one suit at once, and since he can only do one load/unload at a time, can he manage to test the suits in less than 4 hours ?

Submitted by pcbouhid

Rating: 2.5000 (4 votes)

Solution: (Hide)

1) Load suit A into 1st chamber...10 minutes.
2) Load suit B into 2nd chamber...+10 minutes.
3) Wait 50 minutes (Suit A is already tested in one pressure)...+50 minutes.
4) Change pressure in 1st chamber, to start the test of suit A in other pressure...+4 minutes.
5) Wait 6 minutes (Suit B is already tested in one pressure)...+6 minutes.
6) Unload suit B from 2nd chamber...+10 minutes.
7) Load suit C into 2nd chamber...+10 minutes.
8) Wait 34 minutes (suit A is already tested in the other pressure)...+34 minutes.
9) Unload suit A from 1st chamber...+10 minutes.
10) Load suit B into 1st chamber...+10 minutes.
11) Wait 6 minutes (suit C is already tested in one pressure)...+6 minutes.
12) Change pressure in 2nd chamber...+4 minutes.
13) Wait 50 minutes (suit B is already tested in the other pressure)...+50 minutes.
14) Unload suit B from 1st chamber...+10 minutes.
15) Unload suit C from 2nd chamber (suit C is already tested in the other pressure)...+10 minutes.

TOTAL : 234 minutes, or 3 hours and 54 minutes.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
Puzzle Thoughts	K Sengupta	2023-07-18 00:52:29
re(3): Shave off 10 mins	Charley	2005-06-13 15:20:52
re(2): Shave off 10 mins	armando	2005-06-13 13:06:52
re: Shave off 10 mins	pcbouhid	2005-06-13 12:31:42
re: Shave off 10 mins	pcbouhid	2005-06-13 12:28:48
Shave off 10 mins	Charley	2005-06-13 06:38:53
re: One word !	pcbouhid	2005-06-08 16:06:29
One word !	Rex	2005-06-08 12:44:29
To OOO and Armando	pcbouhid	2005-06-07 23:19:03
re(2): One way	armando	2005-06-07 21:19:03
me too	yocko	2005-06-07 18:57:59
makes sense to me	Joe Dersch	2005-06-07 18:34:53
re:One Way	MathManiac	2005-06-07 18:06:43
re: One way	pcbouhid	2005-06-07 17:38:50
One way	armando	2005-06-07 14:12:18
Short and Sweet (no spoiler)	Old Original Oskar!	2005-06-07 14:01:13

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