The number of photos that will be scanned in 21 minutes given a constant scanning rate is 3 photos.
Details of Scanner :
- Number of photos scanned = 63
- Time taken = 9 minutes
The scanning rate can be calculated thus :
- 1 photo = 63 / 9 = 7 minutes
- It takes 7 minutes to scan 1 photo
The number of photos that can be scanned in 21 minutes :
- Number of minutes / scanning rate
- 21 minutes / 7 minutes = 3
Therefore, 3 photos will be scanned in 21 minutes.
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