Genius IQ Test - Crossing the bridge
Guys,
Please read the rule at
Genius IQ Test - Set of Numbers before start answering this question.
Four persons are standing in front of a canyon. The only bridge can carry only two persons at once. Because of the darkness the persons have to use a torch. Unfortunately there is only one torch. Whenever two persons have crossed the bridge one person must carry back the torch. Person A needs 5 min for crossing the bridge (one way). B needs 10 min, C needs 20 min and D needs 25 min. Two persons together need the time of the slower one. What is the minimum time for the group to cross the bridge?
