The communication channel transmits data continuously for 10 hours. The data transfer rate during the first 6 hours

The communication channel transmits data continuously for 10 hours. The data transfer rate during the first 6 hours is 512 Kbps, and the rest of the time is half as much. How many MB of data was transferred during the channel operation?

512 kilobits is 64 kilobytes per second.
6 hours is 60 * 60 * 6 = 21600 seconds
21600 * 64 = 1382400 kilobytes in 6 hours i.e. 1382400/1024 = 1350 megabytes
512/2 = 256 kilobits per second speed over the next 4 hours. those. 32 kilobytes per second
60 * 60 * 4 = 14400 seconds
14400 * 32 = 460800 kilobytes in 4 hours i.e. 460800/1024 = 450 Megabytes
now add 1350 and 450 we get 1800 Megabytes in 10 hours