1. A concrete planter is a rectangular prism measuring 4 ft by 2 ft by 3 ft, with a hollow interior of 3.5 ft by 1.5 ft by 2.5 ft. If concrete costs $120$ per cubic foot, what is the total cost? $___
2. A wooden display has two tiers. The bottom is 12 cm x 10 cm x 4 cm and the top is 8 cm x 10 cm x 6 cm. If the wood weighs 0.6 g/cm³, what is the total weight?
3. A rectangular aquarium has dimensions of 50 cm, 30 cm, and 40 cm. Water has a mass of 1 gram per cubic centimeter. What is the mass in grams of the water when the aquarium is full? ___ g
4. To find the cost of a statue made of marble, given its dimensions and the cost per cubic meter, what is the essential first step?
5. A hollow block has outer dimensions 10 in x 8 in x 6 in and inner dimensions 8 in x 6 in x 4 in. If the material costs $2$ per cubic inch, what is the cost of the block? $___
6. A metal part consists of two joined rectangular prisms. One is 2x3x10 cm, the other is 4x3x5 cm. If the metal weighs 8 g/cm³, what is the total weight?
7. A bookshelf is made from a vertical piece of wood (3 ft x 1 ft x 6 ft) and a horizontal piece (4 ft x 1 ft x 2 ft). If the wood costs $25$ per cubic foot, what is the total cost of the wood? $___
8. A hollow square beam is 100 cm long with outer sides of 20 cm and inner sides of 15 cm. If the material weighs 7.5 g/cm³, what is the beam's total weight?
9. A contractor needs to determine the amount of paint required to cover the four walls and ceiling of a rectangular room. Which measurement should be calculated?
10. An L-shaped water trough has a shallow section measuring $6$ ft by $3$ ft with a depth of $2$ ft, and a deep section measuring $4$ ft by $3$ ft with a depth of $5$ ft. What is the total volume of water needed to fill it? ___ cubic ft.