Four people need to cross a bridge at night with only one torch that can only illuminate two people at a time. Person A takes 1 minute, B takes 2 minutes, C takes 7 minutes, and D takes 10 minutes to cross. When two people cross together, they travel at the slower person's pace. What is the minimum time required for all four people to cross the bridge?
Anonymous
2d
12 minutes
Anonymous
4d
17 munite
Saro 3895
5d
17 minutes
Anonymous
5d
7
Anonymous
5d
7
Anonymous
8d
7min
Anonymous
8d
A+B and c+D same time a bridge cross total a 7 min
Sweta Rastogi
11d
works at
12 min as d and c will take 10 min, then 1 and 2 min
Avatar Singh
12d
17 minutes
AISHWARYA KR
13d
17
Anonymous
13d
17 minutes
Mohanapriya R
15d
A + B = 2
A returns = 1 min
C + D = 10 min
B returns = 2 min
A + B again = 2 min ,total = 17 mins
Mayank Sharma
15d
10
Mohammad Imran
15d
This is a classic logic puzzle known as the Bridge and Torch problem. The goal is to get all four people across the bridge in the least amount of time, under these constraints: Only two people can cro...read more
nikhil tripathi
19d
10 mins
Anonymous
22d
Answer=17 min ------------------------------ 1&2 will go in 2 min 1 will come back in 1 min 7&10 will go in 10 min 2 will come back in 2 min 1&2 will go in 2 min ------------------------------- Total ...read more
KV Brother
22d
10 mins
Bhupendra Sariyot
22d
10 minutes
Anonymous
22d
17 minutes
Sathish N
23d
10 min
Raju Chowdhury
24d
17 Min
Anonymous
25d
10 minutes
Nayaz Ahmedkhan
25d
10min , beacause this is the slowest time taken
Anonymous
29d
7 minute
Kumari Shampath
29d
17 minutes
satish Mahale
1mo
minimum time required for all four = 5 minutes
Anonymous
1mo
21 Minutes Min Time
RAJESH Kumar
1mo
17 minutes
Nivi S
1mo
a -> b = 2
a <-- = 1
c , d --> 10
b<-- = 2
a,b --> 2
total 2+2+10+2+1 = 17
Sanjay Kumar Dalei
1mo
17
Balwan Katariya
1mo
17
tejas yadav
1mo
It follows 11+1, 7+1 and 2 mins = 21 mins.
Anonymous
1mo
Milind Jaiswal
17 Minutes
Sanjay Kumar yadav
1mo
ex -
2 minutes
Rishikesh Choudhari
1mo
17 minute
Mukesh Kumar
1mo
17
Muhammad fahis p
1mo
currently not working
Cross time 2 mints
The minimum time required is (17) minutes.
Anonymous
1mo
17 Min
Rubul Kalita
1mo
17 minutes
vasant namasale
1mo
10 minute
Shlok Sen
1mo
17min
Revanna Joel
1mo
21 minutes
2+1+7+1+10
Anonymous
1mo
17min
brightestchana
1mo
17 min
Nitin Kumar
1mo
17 मिनट
Anonymous
1mo
17 minutes
Natesan Bsc
1mo
Total time is 2 + 1 + 10 + 2 + 2 = 17 minutes
Harshal Chatse
1mo
17
Anonymous
1mo
20 minutes
Krishnaraj
1mo
21 min because Ist goes A and D it's take 10 min and A is come back 1 min IInd goes A and C it's take 7 min and A is come back in 1 min and IIIrd goes A and B it's take time is 2 min and add in I-11 m...read more
Lokanathan A
1mo
17 minutes
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