Q28,p3,D14. What is the propagation time if the distance between the two points is 48,000 ? Assume the propagation speed to be 2.4 ×108 metre/second in cable.
(A) 0.5 ms (B) 20 ms
(C) 50 ms (D) 200 ms
Answer D
Explanation.
48000km/(2.4*108)= 48*106m/(2.4*108)= 20x10-2
=200x10-3s.=200ms
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