It's time management!
There are four men trying to pass a bridge in dark. They have only one flashlight which is necessary to pass the bridge. Only maximum of two can pass the bridge at one time .
A takes 1 minute, B takes 2 minutes, C takes 7 minutes, and D takes 10 minutes to cross the bridge respectively.
When two men are passing the bridge the one taking more time gives total time for both (if A and B pass the bridge together time taken is 2 min). Find the minimum time in which all of them will pass the bridge.
The answer is 17.
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first of all A and B will pass the bridge which will take 2 min then A will go back to give flash light to C and D taking 1 min and then C and D will pass the bridge taking 10 min.Now B will go to A with flashlight taking 2 min and then A and B will again cross the bridge taking 2 min. Thus total time taken is 17 min.