calculating data sizes

Question 1

how to work out size of text files

Answer 1

1 byte per character+10% for any overheads (fonts or file type)

Question 2

how to work out size of image files

Answer 2

(number of pixels*number of bytes per pixel)+10% for any overheads

Question 3

how to work out size of sound files

Answer 3

bytes per samplesamples per secondchannels*duration

Question 4

how do you get from bytes to KB?

Answer 4

divide by 1000

Question 5

how do you get from MB to bytes?

Answer 5

times by 1000 twice

Question 6

Example Q. Text file that contains 10000 characters. give answer in KB

Answer 6

1 byte per character+10% for any overheads 
10,000+10% 
10,000x1.1
11,000
=11KB