Let’s break this down question by question with explanations where required. If you'd like me to solve any specific question, let me know!

Here is a summary of the questions in the image:

1. Question 3

   • A trapezoidal prism is to be electroplated at a rate of Rs 25 per square meter.
   • Find the expenditure for electroplating.
   • Also, calculate the volume of the prism.

2. Question 4

   • Frame real-life problems based on surface area: i) Surface area of face A and its opposite face.
     ii) Surface area of faces B & C and their opposites.
     iii) Total surface area.

3. Question 5

   • A rectangular prism aquarium with:
     • Base = 180 cm × 70 cm
     • Height = 121 cm
   • Find the glass area used when:
     • The top is open.
     • 0.5% glass is wasted.

4. Question 6

   • Tobacco companies label 85% of the surface area of cigarette packs with warnings.
   • You need to:
     • Label the area with dimensions and add a picture.

5. Question 7

   • A hexagonal prism pen stand has:
     • Side of hexagon = 3 cm
     • Height = 9 cm
   • The stand is open at one end.
   • Find its total outer surface area.

6. Question 8

   • Calculate the total surface area and volume of the given prism in the diagram.

7. Question 9

   • Find the total surface area of a cylinder with:
     • Radius = 7 cm
     • Height = 15 cm.

8. Question 10

   • A cylinder-shaped can has:
     • Height = 12 cm
     • Radius = 3.5 cm
     • Label has an overlap of 1.5 cm vertically.
   • Find the area of the paper label.

Would you like me to solve a particular question? For example:

• Calculating the volume or surface area in specific problems?
• Converting to step-by-step solutions?

5 Related Questions

1. How do you calculate the surface area of a trapezoidal prism?
2. What is the process for finding the total surface area of a hexagonal prism?
3. How do you calculate glass waste in percentage for rectangular aquariums?
4. What formula is used to calculate the curved surface area of a cylinder?
5. How do you account for overlaps in surface area calculations?

Tip: To calculate the total surface area, always include both lateral (curved) and base areas in your formula. Let me know if you need specific explanations!