7. consider a user who needs to transmit 1.5 gigabytes of data to a server. the user lives in a small town where only dial-up access is available. a bus visits the small town once a day from the closest city, located 150 km away, and stops in front of the user’s house. the bus has a 100-mbps wifi connection. it can collect data from users in rural areas and transfer them to the internet through a 1 gbps link once it gets back to the city. suppose the average speed of the bus is 60 km/h. what is the fastest way the user can transfer the data to the server?

Fastest way to transfer data is to sit in car and transfer in 2 hours and 3 seconds

Explanation:

Given that:

Data needed to be transmitted = 1.5 gigabytes

Distance from closest city = 150 km

Bus connection speed of WiFi = 100 Mbps

Bus transferring rate = 1 Gbps

Average speed = 60 km/h

Now we have to find the fastest way for transfer of data, so

Converting total data given from GB to MB (1GB = 1024 MB):

Data = 1.5 GB = 1.5 * 1024 MB = 1536 MB

For converting Megabytes into megabits (multiply by 8):

Data = 1536 *8 Mb = 12288 Mb

Now calculating the time of travel:

Time to travel = Distance from closest city / Average speed

Time to travel = 50km/60km/h= 2.5h

Converting into seconds (1 hour = 60 seconds)

Time to travel = 2.5 * 60 = 9000 seconds

Now calculating Time to transfer data:

Time for transfer = Time to travel / Bus connection speed

Time for transfer = 12288Mb/100Mbps = 122.88 Seconds

Converting it into hours and second (60s = 1 hour)

Time for transfer = 122.88 seconds / 60 = 2 hours and 3 seconds

So the user can sit in the bus and transfer data in 2 hours and 3 seconds

i hope it will help you!

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