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What is the context switch time, if a disk drive with a transfer rate of 3 Mb/s is used to swap part of a program

What is the context switch time, if a disk drive with a transfer rate of 3 Mb/s is used to swap part of a program that is 240 KB in size? Assume that no seeks are necessary and that the average latency is 25 ms. Explain your answer.

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