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How many trips does it take for 100 adults and 2 children to cross the river.?
1 adult can go at a time while 2 kids can go at a time. This is one of my math problems please help
3 Answers
- icemanLv 74 years ago
Assuming they cross in a little boat:
1) 2 children cross
2) 1 stays the other bring the boat back
3) 1 adult crosses,
4) the child bring the boat back
repeat the cycle 99 times, all adults have crossed
last trip be the two children crossing
Total trips = 4*100 + 1 = 401
- ?Lv 44 years ago
Not enough info, do they have to go back or not? Is it a bridge or boat type problem?
- L. E. GantLv 74 years ago
Let's see...
2 kids cross over
1 kid comes back
1 adult crosses
1 kid comes back
that's 4 trips to get one adult across
so, 100 * 4 = 400 trips to get the adults across
plus one to get the two kids onto the other side.
hence 401 trips.
