Water task By: Stella

Introduction For this task, we were told to imagine that we lived in a developing country and had to design a container that could hold all the water that we needed for a day for our family. The nearest water well would be 1 km away. It would be made of plastic and could be any shape that we wished. We were given a rope to help us drag the container. We had to decide on the size of the container based on how much water we needed for each day, which we estimated and came up with a total. We also have to make sure that it's realistic, for example, I will be able to carry 200 liters in one trip is unachievable, therefore unrealistic.

What the water is used for AMOUNT OF WATER DRINKING 6 L (2 L per person) COOKING 5 L WASHING CLOTHES & DISHES Reuse water used in shower SHOWER/BATHING 45 L (15 L per person) For my family, which has three people, we will use 5 L of water for cooking and reuse it when we can. Each person will get 2 liters to drink, since that's what recommended based on my research. We will each get 15 L of water to bathe and will use something to catch the water and reuse the cleaner parts to wash dishes and clothes. Total of 56 L a day for 3 People

Dimensions for my container Wheels are made of wood.

Calculations 70cm X 40 cm X 20 cm = 56000 cm^3 56000 cm^3 = 56000 mL 56000 mL = 56 L Extra Notes: 1 cm^3 = 1 mL 1000 mL = 1 L

Accuracy and units I believe that my calculations are very accurate because I used many exact measurements rather than needing to round. My estimations are accurate because I based most of them on research of the amount of water that people in developing countries actually use for the purposes that I have. I made sure to use whole numbers so I wouldn't require any rounding, so it'd be more accurate, and it'd still be a simple answer and simple calculations in the end. The most challenging part of this task was trying to figure out how many liters was needed in an entire day. After I estimated the amount I needed for my family, I asked some of my peers and most of theirs were in a 50-80 liter range, so my amount is pretty accurate, compared to others. I used liters because it's the more global unit for measuring units, and it's easier to convert to smaller, larger or other forms of measure to such as mass. I used centimeters cubed when finding volume because I used centimeters to measure the dimensions and then I converted the amount into liters and millimeters since they are used to measure liquids.

Design My design makes sense because it's able to be proven to be correct. I think that it could be more realistic, because I know that I won't actually be able to carry 56 liters, which, based on research, is equivalent to 56 kilograms. I have a rectangular prism that's 70 cm in length, 40 cm wide and 20 cm tall. Theres a plastic lid that's 70 cm X 40 cm. The shape is one of a smaller surface area and a larger volume that can be used to carry water, so it's slightly lighter and can carry more water. I chose to make it shorter rather than longer or wider, because then I wouldn't have to worry about whether or not it would fall over on an uphill or downhill surface. There are 4 wooden wheels below the container that has a wooden axel to keep the wheels from falling off. The rope will be tied around the container and will be pulled from one side so the container, on wheels, will be dragged behind it and will require less effort in carrying the large container. The rope and wheels would make it easier to take for a full kilometer. I think that I could've made it more realistic by making the container smaller so that I'd go two rounds and only carry about half of the weight. However, I've tried to pick up the water from the dispensers, which is almost 19 liters, and is a reasonable amount to carry, and with wheels and a rope, 28 liters would still be a decent amount. If I were to do this task again, I'd change the shape into a cylinder, with a handle on it, and only make it 28000 cm cubed in volume (28 liters), so even if I have to go twice, it'll be more realistic. I'd also use a different transportation method, e.g. make it like a backpack. But overall, I am content with my design.