mr and mrs smith, their 2 children and fog want to cross a river in a boat that would hold only 80 kg and both mr. amd Mrs Smith have a mass of 80 kg and both the children have a mass of 40 kg and the dog has a mass of 5 kg explain how they can cross the river in the fewest crossings possible
2=160 (parents) or could it be 40 kg each
2= 80 ( kids) or could kids be 20 kg each???
1= 5 kg (dog)
So 1 parent (40kg), 1 kid (20kg), 1dog (15kg) total = 75.
They go across and kid ( 20kg) comes back.
So 1 parent 40kg) and 1 kid (20kg) go across.
Answer 3 trips
Not sure if this is correct.
Let me know
Thanks