Video Editing Worksheet: Video Length

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

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.

1. 1.⏱️ A 30-second clip is slowed to half speed (slow motion). How long does it last now (in seconds)?
2. 2.⏱️ An 87-second clip is sped up to 3× speed. How long does it last now (in seconds)?
3. 3.⏱️ How many seconds is 9 minutes 53 seconds?
4. 4.⏱️ A video has three clips of 45, 27 and 36 seconds. How long is the video (in seconds)?
5. 5.⏱️ A video has three clips of 31, 6 and 29 seconds. How long is the video (in seconds)?
6. 6.⏱️ Your video must be 120 seconds long. Your clips add up to 78 seconds. How many more seconds of video do you need?
7. 7.⏱️ A video has three clips of 60, 45 and 9 seconds. How long is the video (in seconds)?
8. 8.⏱️ Your video must be 90 seconds long. Your clips add up to 76 seconds. How many more seconds of video do you need?
9. 9.⏱️ Your video must be 60 seconds long. Your clips add up to 43 seconds. How many more seconds of video do you need?
10. 10.⏱️ How many seconds is 5 minutes 10 seconds?
11. 11.⏱️ A video is 425 seconds long. How long is that in minutes and seconds? (a) 7 min 5 s (b) 8 min 5 s (c) 7 min 35 s (d) 4 min 25 s
12. 12.⏱️ A video is 420 seconds long. How long is that in minutes and seconds? (a) 4 min 20 s (b) 7 min 0 s (c) 8 min 0 s (d) 7 min 30 s
13. 13.⏱️ A video has three clips of 48, 39 and 43 seconds. How long is the video (in seconds)?
14. 14.⏱️ How many seconds is 2 minutes 47 seconds?
15. 15.⏱️ A 5-second clip is slowed to half speed (slow motion). How long does it last now (in seconds)?
16. 16.⏱️ Your video must be 180 seconds long. Your clips add up to 119 seconds. How many more seconds of video do you need?
17. 17.⏱️ Your video must be 90 seconds long. Your clips add up to 69 seconds. How many more seconds of video do you need?
18. 18.⏱️ A video has three clips of 50, 36 and 51 seconds. How long is the video (in seconds)?
19. 19.⏱️ How many seconds is 1 minute 21 seconds?
20. 20.⏱️ A video has three clips of 58, 19 and 13 seconds. How long is the video (in seconds)?
21. 21.⏱️ How many seconds is 6 minutes 15 seconds?
22. 22.⏱️ A video is 345 seconds long. How long is that in minutes and seconds? (a) 5 min 15 s (b) 3 min 45 s (c) 5 min 45 s (d) 6 min 45 s
23. 23.⏱️ A video has three clips of 20, 11 and 13 seconds. How long is the video (in seconds)?
24. 24.⏱️ A 76-second clip is sped up to 4× speed. How long does it last now (in seconds)?
25. 25.⏱️ A video has three clips of 48, 51 and 47 seconds. How long is the video (in seconds)?
26. 26.⏱️ When you put clips one after another, the video length is … (a) the longest clip (b) the sum of the clips (c) the shortest clip (d) always 1 minute
27. 27.⏱️ How many seconds is 4 minutes 17 seconds?
28. 28.⏱️ A video has three clips of 15, 25 and 39 seconds. How long is the video (in seconds)?
29. 29.⏱️ How many seconds is 9 minutes 6 seconds?
30. 30.⏱️ A 17-second clip is slowed to half speed (slow motion). How long does it last now (in seconds)?
31. 31.⏱️ Your video must be 90 seconds long. Your clips add up to 63 seconds. How many more seconds of video do you need?
32. 32.⏱️ How many seconds is 1 minute 50 seconds?
33. 33.⏱️ How many seconds is 6 minutes 48 seconds?
34. 34.⏱️ A 36-second clip is sped up to 4× speed. How long does it last now (in seconds)?
35. 35.⏱️ Your video must be 120 seconds long. Your clips add up to 56 seconds. How many more seconds of video do you need?
36. 36.⏱️ A video has three clips of 12, 25 and 14 seconds. How long is the video (in seconds)?
37. 37.⏱️ A video has three clips of 40, 41 and 29 seconds. How long is the video (in seconds)?
38. 38.⏱️ How many seconds is 8 minutes 42 seconds?
39. 39.⏱️ A 24-second clip is slowed to half speed (slow motion). How long does it last now (in seconds)?
40. 40.⏱️ Speeding a clip up to 2× makes it … (a) the same length (b) silent (c) twice as long (d) half as long

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