A laptop computer communicates with a router wirelessly, by meansof radio signal

Question

A laptop computer communicates with a router wirelessly, by meansof radio signals. The router is connected by cable directly to theInternet. The laptop is 8.8 mfrom the router, and is downloading text and images from theInternet at an average rate of 254 Mbps, or 254 megabits per second. (A bit,or binary digit, is the smallest unit of digitalinformation.) On average, how many bits are downloaded to thelaptop in the time it takes the wireless signal to travel from therouter to the laptop?

bits

Explanation / Answer

d = 8.8m    t = d / c = 8.8m/ 3.0 x 108 m/s    ==> t = 2.933 x 10-8 s For 1 s we have 254 Mb    ==> 2.933 x 10-8 --> ? Therefore         1 sec * x = (2.933 x10-8) (254Mb) ==> x = 744.98 x 10-8 Mb Therefore 744.98 x 10-8 Mb downloaded to thelaptop in time

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