![tyannamonae](/avatars/16082.jpg)
tyannamonae
26.06.2019 •
Social Studies
Four soldiers - p, q, r and s need to croos a bridge. a maximum of two person can cross it at a time. it is night and they just have one lamp. persons that cross the bridge must carry the lamp to find the way. a pair must walk together at the speed of slower person. after crossing the bridge, the person having faster speed in the pair will return with lamp each time to acompany another person in the group. finally, the lamp has to be returned at the original place and the person who returns the lamp has to cross the bridge again without lamp. to cross the bridge, the time taken by them is as follows: p: 1 minutes, q: 3 minutes, r: 7 minutes and s: 10 mimutes. what is the total minimum time required by all the soldiers to cross the bridge?
Solved
Show answers
More tips
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
- F Family and Home How to Sew Curtain Tapes: Best Tips from Professionals...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- F Food and Cooking The Disease That Haunted Abraham Lincoln...
- C Computers and Internet How to Get Rid of Windows Genuine Check?...
- H Health and Medicine How to perform artificial respiration?...
- S Style and Beauty Tricks and Tips: How to Get Rid of Freckles...
Answers on questions: Social Studies
- S Social Studies An adult diagnosed with antisocial personality disorder is most likely to have met the criteria for as a child. a. autistic disorder b. conduct disorder c. learning disabled...
- M Mathematics An industrial psychologist is investigating the effects of work environment on employee attitudes. A group of 20 recently hired sales trainees were randomly assigned to one...
- H History How do anthropologist use the absolute dating technique to study prehistory...
- A Arts Here are some free points! today s my birthday so i feel like giving free points :) have a good day...
- M Mathematics Adiscount of 16 % saved jackie $38 on office supplies. what was the price of the supplies before the discount...
Ответ:
The initial solution most people will think of is to use the fastest person as an usher to guide everyone across. How long would that take? 10 + 1 + 7 + 1 + 2 = 21 mins. Is that it? No. That would make this question too simple even as a warm up question.
. To reduce the amount of time, we should find a way for 10 and 7 to go together. If they cross together, then we need one of them to come back to get the others. That would not be ideal. How do we get around that? Maybe we can have 1 waiting on the other side to bring the torch back. . The fastest way to get 1 across and be back is to use 2 to usher 1 across. So let’s put all this together.
1 and 2 go cross
2 comes back
7 and 10 go across
1 comes back
1 and 2 go across (done)
Total time = 2 + 2 + 10 + 1 + 2 = 17 mins
mark as brainlest pl
Ответ:
Article II vests the executive power in the President, which gives him the power to oversee and direct the various aspects of the executive branch. ... When Congress does this, it is presumed that the President is authorized to issue executive orders to carry out Congress' goals in passing federal legislation.