Answer Key: Self-Test C-1.3

  1. Calculate the surface area of a totally enclosed square tank that is 92″ in. height.
    1. 50,784 in.2
  2. Calculate the area of a 1,200 mm x 1,575 mm rectangle.
    1. 1,890,000 mm2
  3. What is the total surface area of a 1.2 m x 1.7 m x 1.35 m totally enclosed box?
    1. 11.91 m2
  4. Calculate the area in square inches of a right triangle with a 2′ 9″ base and 4′ 3″ height.
    1. 841.5 in.2
  5. What is the square footage of a 52″ high right triangle with a 3′ 7″ base?
    1. 7.764 ft.2
  6. Calculate the area in square feet of a circle with an 18 1/2″ radius.
    1. 7.467 ft.2
  7. What is the area of a manhole cover used on a 1,800 mm diameter opening?
    1. 2,544,696 mm2
  8. How many square metres of grating are there in a 1.1 m wide walkway around a tank with a diameter of 7 metres?
    1. 27.99 m2
  9. What is the surface area, in square feet, of a 2′ 6″ x 2′ 2″ x 28″ fully enclosed rectangular tank?
    1. 32.52 ft.2
  10. What is the surface area of a totally enclosed cylindrical tank that is 4.6 m high and 1.8 m in diameter?
    1. 31.1 m2
  11. Calculate the number of square feet of surface area on a cylindrical vat with an open top that has a diameter of 2′ 7″ and a height of 20′ 4″.
    1. 170.263 ft.2
  12. A circle has an area of 94.5 ft.2 Calculate the diameter of the circle.
    1. 10.97 ft.

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Block C: Routine Trade Activities and Electrical Concepts Copyright © 2026 by Skilled Trades BC, TRU Open Press is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License, except where otherwise noted.

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