A CompactFlash card has a usable capacity of 4 GB. Approximately how many
digital photographs, each of size 2.4 MB, may be stored on it?
Depends on whether this is a simple maths question or a real life one.
if it’s simply maths, then 4000/2.4 = 1666 photos.
however in reality. people confuse the definitions of file size in terms of computer files.
difference is the classic sense of giga mega kilo has a difference of 10^3 = 1000, whereas when described as a computer files the difference is actually 2^10 = 1024.
strictly speaking all the computer files should be using units such as GiB, MiB, KiB (1024) instead of GB MB and KB (1000). however, people just simply use one (ie. GB MB and KB) for simplicity.
but for disk space, it’s actually describe the number of bits in the classic sense. ie.
in this case 4GB = 4 x 10^9 bites = 4 x 10^9/(1024 x 1024) = 3814.7 MB
So in reality, the photos you can store would be,
3814.7/ 2.4 = 1589 photos.
hope it helps.
February 27th, 2010 at 4:52 am
Assuming that a file of 2.4MB only takes up 2.4MB, which isn’t actually the case, then it’s a simple matter of division:
4GB / 2.4MB
1GB = 1000MB
–>
4000 / 2.4 = 1666.667
You can’t store .667 of a photo, so the answer is
~ 1,666 photos
References :
February 27th, 2010 at 5:42 am
Depends on whether this is a simple maths question or a real life one.
if it’s simply maths, then 4000/2.4 = 1666 photos.
however in reality. people confuse the definitions of file size in terms of computer files.
difference is the classic sense of giga mega kilo has a difference of 10^3 = 1000, whereas when described as a computer files the difference is actually 2^10 = 1024.
strictly speaking all the computer files should be using units such as GiB, MiB, KiB (1024) instead of GB MB and KB (1000). however, people just simply use one (ie. GB MB and KB) for simplicity.
but for disk space, it’s actually describe the number of bits in the classic sense. ie.
in this case 4GB = 4 x 10^9 bites = 4 x 10^9/(1024 x 1024) = 3814.7 MB
So in reality, the photos you can store would be,
3814.7/ 2.4 = 1589 photos.
hope it helps.
References :
http://en.wikipedia.org/wiki/File_size