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Printed from https://www.writing.com/main/books/entry_id/981766-Puzzle
Rated: 13+ · Book · Experience · #2171316
As the first blog entry got exhausted. My second book
#981766 added April 22, 2020 at 5:29pm
Restrictions: None
Puzzle
Four friends A, B, C, D need to cross a bridge..

A maximum of 2 people can cross at a time..
It is night and they have just 1 lamp.

People that cross the bridge must carry the lamp to see the way..
A pair must walk together at the speed of slower person…

Speeds of
A: 1 minute to cross bridge
B: 2 minutes to cross bridge
C: 8 minutes to cross bridge
D: 11 minutes to cross bridge

Now question is… “what is the total minimum time required by all 4 friends to cross the bridge….?

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Printed from https://www.writing.com/main/books/entry_id/981766-Puzzle