Question

Anna, buzz, charlene, and dilbert must cross a bridge at night, and a torch is needed to cross. There is only one torch. The bridge can't handle more than two people at a time. Anna can cross in a minute, buzz in 2 minutes, charlene in 5, and dilbert in 10. What is the quickest way to get all 4 across?

Answer 1

Answer:

Anna can cross the fastest...therefore she will first take dilbert to the other side of the bridge...and come back in a minute... so total time spent till here is 11 mins..then buzz and charlene will cross the bridge in 5 mins(total time spent is 16 mins till here)..and buzz will come back to take anna ...he needs 2 mins..to come back..18 mins spent in all...and then anna will cross the bridge with buzz in next 2 mins...therefore this is the fastest way to get all of them to the other side of the bridge...20 mins!

Step-by-step explanation:

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