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Volume. Volume of Rectangular Solids. 1,000 mL. 1 L. 1 cm³. Measuring the Volume of Solid or Irregular Objects. How can the volume of a solid object such as a shoebox be measured?. To measure solid objects that are regular shape, a formula for volume can be applied.

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## Volume

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**Volume**Volume of Rectangular Solids**1,000 mL**1 L 1 cm³**How can the volume of a solid object such as a shoebox be**measured? • To measure solid objects that are regular shape, a formula for volume can be applied**The formula for calculating the volume of a rectangular**object is: Volume = Length x Width x Height Volume = L x W x H Volume = 3cm x 15cm x 4cm Volume = 180 cm³**Why is the unit cm³ used when calculating the volume of a**rectangular object? • When multiplying the object’s length, width and height, the cm units are also multiplied by 3 Example: cm x cm x cm = cm³**The SI unit known for measuring solids with a larger volume**is known as the… • Cubic meter = m³**What is a cubic meter?**• The SI unit used to measure solids with a larger volume • A cubic meter is equal to the volume of a cube that measures 1 meter on each side m x m x m = m³ • Hint: Think of a big box whose 3 sides measure 1 meter each**Suppose a cereal box is 10 centimeters long, 4 centimeters**wide, and 20 centimeters high. What would be the volume of the box? Volume = Length x Width x Height Volume = 10 cm x 4 cm x 20 cm Volume = 800 cm³**Volume**Volume of Irregular Solids**How is the volume of an irregular solid such as a rock**measured? • To measure the volume of an irregular solid, immerse the object in water, and measure how much the water level rises • This method is called the: Water Displacement Method**How does the water displacement method work?**1.Record the volume of water in the first beaker or graduated cylinder Example: 20 ml 2. Carefully place the irregular solid into the water. Record the volume of the water plus the object Example: Now the volume is 32 ml 3.Subtract the volume of the water alone from the volume of the water plus the object Example: 32 ml – 20 ml = 12 ml**Water Displacement**Problem • The graduated cylinder has 22 ml of water • When you add the rock, the water rises to 33 ml. • What is the volume of the rock? • 33 ml – 22 ml = 11ml The volume of the rock is 11 ml

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