Question 2
Four friends A, B, C and D must cross an old bridge in a jungle. They have one flashlight, which must accompany every crossing. At most two people may cross at once. A, B, C and D take 1, 2, 6 and 10 minutes respectively. What is the shortest total time for all four to cross? Enter minutes.
A pair takes the slower person’s time. The flashlight is carried, not thrown, and crossings do not overlap.
A pair takes the slower person’s time. The flashlight is carried, not thrown, and crossings do not overlap.