Four Friends A, B, C, D

Four Friends A, B, C, D Need To Cross A Bridge
A Maximum Of 2 Peoples Can Cross At A Time
It Is Night Nd 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 Perxon

Speeds Of:
A: 1 Minutex To Cross Bridge
B: 2 Minutexs To Cross Bridge
C: 7 Minutes 2 Cross Bridge
D: 1o Minutes 2 Cross Bridge

Now The Question Iz
What Is The Total Minimum Time Required
By All 4 Friends To Cross The Bridge?
21 Mintues.

Page 1 of 612345...Last »