Question

Practice 1
You want to download a video. Its size is 1.5 GB. How much time will it take to download video? If your download speed is:
a) 4 Mbps
b) 10 Mbps
c) 32 Mbps
d) 1 Gbps
Find your own download and upload speeds. Calculate the time to download a 2.5 GB fi le and time to upload a 1.5 GB file.

Информатика көмек пажалуста ​

Answer 1

$1\ GB=2^{30}\,B=2^{33}\ bit$

$1\ Mbps=10^6\ bit/s$

$1\ Gbps=10^9\ bit/s$

$a)\ t=\frac{1.5*2^{33}}{4*10^6}\approx3221,2\ s$

$b)\ t=\frac{1.5*2^{33}}{10*10^6}\approx1288,5\ s$

$c)\ t=\frac{1.5*2^{33}}{32*10^6}\approx402,7\ s$

$d)\ t=\frac{1.5*2^{33}}{1*10^9}\approx12,9\ s$

$t=\frac{2.5*2^{33}}{DS},\ \ s$

$t=\frac{1.5*2^{33}}{US},\ \ s$

where: DS, US -your download and upload speed (in bit/s)