This is quite easy.

1 g of water is 1 cubic millimeter.
1000 g equals 1 kg
1000 millimeters equals 1 meter.
Convert lbs to grams and feet to meters and complete the calculation




areuKIDDINGme wrote:
Our assignment is to create a boat made out of solely milk cartons and
duc tape. With unlimited amounts of only these two supplies, the boat
must be able to float 50 yds of a awimming pool. Now the hard part is
that someone has to maneuver the boat, meaning that it must float
carrying at least 125 lbs. Are there any suggestions as to how many
cartons would be roughly needed to hold up a person and stay afloat at
the same time? Also, any suggestions to the shape of the boat which
would maintain the most bouyany? Thanks!