21. A Mid-oceanic-Ridge has symmetric magnetic anomalies about the ridge axis as shown below. Using the information given in the figure, the average relative velocity between the Plates A and b is calculated to be ________ cm/year.
(Thanks to Pragnath, AU)
Solution:
We know that
$Velocity=\frac{Distance}{Time}$
Given that,
Distance=50
Km= 5*10^6 cm
Time= 1 million year=
10^6 years
$Velocity=\frac{5*10^6}{10^6}$
Relative velocity of the ridge is =10
cm/year
If you fixed one side of the ridge then, the Absolute Velocity is= 5cm/year
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