You are building a floating deck, one that stays on top of the ground using concrete bases, instead of posts dug into the ground. You need to pour 15 bases using molds you found at an estate sale. Unfortunately, the dimensions on these forms are measured in centimeters, and are in the shape of a square frustum. The frustum has a height of 20cm, and the two square bases measure 30x30cm and 20x20cm. This makes it a bit difficult to calculate how much concrete to buy. The bags of concrete are either 60-pound bags (which the bag says is equivalent to 0.017 cubic yards) or 80-pound bags (0.022 cubic yards). The cost difference between the two bags of concrete are proportional to their size, so it doesn't matter which size you buy, but you don't want to waste any.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
You are building a floating deck, one that stays on top of the ground using concrete bases, instead of posts dug into the ground. You need to pour 15 bases using molds you found at an estate sale. Unfortunately, the dimensions on these forms are measured in centimeters, and are in the shape of a square frustum. The frustum has a height of 20cm, and the two square bases measure 30x30cm and 20x20cm.
This makes it a bit difficult to calculate how much concrete to buy. The bags of concrete are either 60-pound bags (which the bag says is equivalent to 0.017 cubic yards) or 80-pound bags (0.022 cubic yards). The cost difference between the two bags of concrete are proportional to their size, so it doesn't matter which size you buy, but you don't want to waste any.
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