Question
What is the importance of longitude?

Answer

$1.$ The importance of longitudes lies in the fact that it facilitates the calculation of the local time of a place very easily.
$2.$ Secondly if one knows the latitudes and longitudes of a place, he can easily locate it either on the map or on a globe without wasting much of time.For example, if Chennai is located on the 80° east longitude then we can easily make out its location.

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