Math Gold Medalist

Lor

2022 AMC 8 

Problem 7

When the World Wide Web first became popular in the $1990$s, download speeds reached a maximum of about $56$ kilobits per second. Approximately how many minutes would the download of a $4.2$-megabyte song have taken at that speed? (Note that there are $8000$ kilobits in a megabyte.)

$\textbf{(A) } 0.6 \qquad \textbf{(B) } 10 \qquad \textbf{(C) } 1800 \qquad \textbf{(D) } 7200 \qquad \textbf{(E) } 36000$

Unit Conversion

1 byte = 8 bits

1 megabyte = 1000 kilobits

1 minute = 60 seconds

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   Solution