The data transfer rate over the ADSL connection is 1,024,000 bps. It took 5 seconds to transfer

The data transfer rate over the ADSL connection is 1,024,000 bps. It took 5 seconds to transfer the file over this connection. Determine the file size in kilobytes.

Let’s determine the total number of bits (the size of the original file) that was transferred in 5 seconds:

1,024,000 bits / sec x 5 seconds = 5,120,000 bits.

Let’s convert the resulting number of bits into Kbytes, taking into account that:

1 byte = 8 bits;

1 KB = 1024 bytes;

1 MB = 1024 KB.

Hence:

5120000 bits = 5120000: 8 = 640,000 bytes;

640,000 bytes = 640,000: 1024 = 625 KB.