Can you bring all of them safely down ?

Question

There are three people trapped on a tower, which has a pulley carrying 2 buckets such that you can use a counterweight with a difference in weight of 15 kg with respect to you to get yourself up or down.

The three people weigh 90, 105, & 195 kg. There is also a ball weighing 75 kg with them at the top of the tower. Assuming there is a lot of room in these buckets how can you get the 3 people safely down without dropping ( the difference in weight at the 2 buckets should not exceed 15 kg. ) them.

[ P.S. the buckets are always going to be 1 up and 1 down. ]

Answer 1

The strategy is:

1. Lowering 195 kg man using of counterweight 105 kg man plus 75 kg ball- keeping 15 kg difference
2. Lowering 105 kg man using of counterweight 90 kg man- keeping 15 kg difference
3. Lowering 90 kg man using of counterweight 75 kg ball- keeping 15 kg difference

we assume that lowering the ball is not against the rule, ball can be lowered without safe load difference of 15 kg

see below picture for exact steps of rescue: