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Video Editing Worksheet: Video Length

Animation and design lesson 21: Video length sums · Set 60 · 40 questions
TalentJR

Creator's tip (Add the clips): Video length = the clips added up. Minutes → seconds: × 60, then add the extra seconds. Seconds → minutes: take away 60 as many times as it fits. Still needed = target − what you have; 2× speed halves the time, half speed doubles it.

NameDateTime takenScore ___ / 40
  1. 1.⏱️ Your video must be 60 seconds long. Your clips add up to 47 seconds. How many more seconds of video do you need?
  2. 2.⏱️ A 27-second clip is slowed to half speed (slow motion). How long does it last now (in seconds)?
  3. 3.⏱️ Your video must be 90 seconds long. Your clips add up to 73 seconds. How many more seconds of video do you need?
  4. 4.⏱️ A video has three clips of 58, 7 and 34 seconds. How long is the video (in seconds)?
  5. 5.⏱️ How many seconds are in 1 minute? (a) 30 (b) 60 (c) 10 (d) 100
  6. 6.⏱️ When you put clips one after another, the video length is … (a) the shortest clip (b) always 1 minute (c) the sum of the clips (d) the longest clip
  7. 7.⏱️ A 39-second clip is sped up to 3× speed. How long does it last now (in seconds)?
  8. 8.⏱️ A video has three clips of 11, 18 and 20 seconds. How long is the video (in seconds)?
  9. 9.⏱️ Your video must be 120 seconds long. Your clips add up to 81 seconds. How many more seconds of video do you need?
  10. 10.⏱️ How many seconds is 7 minutes 59 seconds?
  11. 11.⏱️ A 30-second clip is slowed to half speed (slow motion). How long does it last now (in seconds)?
  12. 12.⏱️ A video has three clips of 55, 42 and 25 seconds. How long is the video (in seconds)?
  13. 13.⏱️ How many seconds is 2 minutes 5 seconds?
  14. 14.⏱️ How many seconds is 5 minutes 2 seconds?
  15. 15.⏱️ How many seconds is 6 minutes 53 seconds?
  16. 16.⏱️ Your video must be 120 seconds long. Your clips add up to 71 seconds. How many more seconds of video do you need?
  17. 17.⏱️ A 50-second clip is sped up to 2× speed. How long does it last now (in seconds)?
  18. 18.⏱️ A video is 400 seconds long. How long is that in minutes and seconds? (a) 4 min 0 s (b) 6 min 10 s (c) 6 min 40 s (d) 7 min 40 s
  19. 19.⏱️ Your video must be 60 seconds long. Your clips add up to 49 seconds. How many more seconds of video do you need?
  20. 20.⏱️ How many seconds is 8 minutes 17 seconds?
  21. 21.⏱️ How many seconds is 8 minutes 48 seconds?
  22. 22.⏱️ How many seconds is 7 minutes 37 seconds?
  23. 23.⏱️ A 29-second clip is slowed to half speed (slow motion). How long does it last now (in seconds)?
  24. 24.⏱️ A video is 390 seconds long. How long is that in minutes and seconds? (a) 6 min 0 s (b) 6 min 30 s (c) 3 min 90 s (d) 7 min 30 s
  25. 25.⏱️ A video is 110 seconds long. How long is that in minutes and seconds? (a) 2 min 50 s (b) 1 min 20 s (c) 1 min 10 s (d) 1 min 50 s
  26. 26.⏱️ A 78-second clip is sped up to 2× speed. How long does it last now (in seconds)?
  27. 27.⏱️ A video has three clips of 54, 18 and 32 seconds. How long is the video (in seconds)?
  28. 28.⏱️ A video has three clips of 47, 20 and 34 seconds. How long is the video (in seconds)?
  29. 29.⏱️ A 20-second clip is sped up to 4× speed. How long does it last now (in seconds)?
  30. 30.⏱️ A video is 285 seconds long. How long is that in minutes and seconds? (a) 4 min 45 s (b) 2 min 85 s (c) 4 min 15 s (d) 5 min 45 s
  31. 31.⏱️ Speeding a clip up to 2× makes it … (a) twice as long (b) the same length (c) half as long (d) silent
  32. 32.⏱️ Your video must be 60 seconds long. Your clips add up to 14 seconds. How many more seconds of video do you need?
  33. 33.⏱️ How many seconds is 9 minutes 54 seconds?
  34. 34.⏱️ A 4-second clip is slowed to half speed (slow motion). How long does it last now (in seconds)?
  35. 35.⏱️ Your video must be 90 seconds long. Your clips add up to 27 seconds. How many more seconds of video do you need?
  36. 36.⏱️ A 26-second clip is slowed to half speed (slow motion). How long does it last now (in seconds)?
  37. 37.⏱️ A 105-second clip is sped up to 3× speed. How long does it last now (in seconds)?
  38. 38.⏱️ A 54-second clip is sped up to 2× speed. How long does it last now (in seconds)?
  39. 39.⏱️ Your video must be 90 seconds long. Your clips add up to 15 seconds. How many more seconds of video do you need?
  40. 40.⏱️ Your video must be 120 seconds long. Your clips add up to 33 seconds. How many more seconds of video do you need?

Answer key

  1. 13
  2. 54
  3. 17
  4. 99
  5. 60
  6. the sum of the clips
  7. 13
  8. 49
  9. 39
  10. 479
  11. 60
  12. 122
  13. 125
  14. 302
  15. 413
  16. 49
  17. 25
  18. 6 min 40 s
  19. 11
  20. 497
  21. 528
  22. 457
  23. 58
  24. 6 min 30 s
  25. 1 min 50 s
  26. 39
  27. 104
  28. 101
  29. 5
  30. 4 min 45 s
  31. half as long
  32. 46
  33. 594
  34. 8
  35. 63
  36. 52
  37. 35
  38. 27
  39. 75
  40. 87

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