Question

when it is time at niger on longitude 15° if the time india is6:00pm solution of this question

Answer 1

360 degrees /24 hours = 15 degrees of longitude per hour

middle of India is about 75 degrees east
niger is about 15 deg west
so difference is about 75+15 = 90degrees, (1/4 of a day earlier than India)
High noon :)