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Quiz: 4 persons need to cross a bridge where only 2 can cross at a time, having 1 torch. A can cross in 1 min, B in 2 min, C in 5 min and D in 10 min. What combination will make them go fastest across the bridge.

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A and b, c and d

jaishree en

0

A and b, c and d

jaishree en

0

A and D, B and C

Ram en

0

1. A & B go together and B return = 2(crossing)+2 (B return back with tourch) = 4 min 2. C & D go together and A return = 10 (C & D crossing ) + 1 (A return back with tourch) = 11 min 3 A & B cross the bridge = 2 min Total 4 min+11 min + 2 min = 17 mins

Manish Gehlot en

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