The correct answer is 75 degrees W . Longitude.
Key Points
Finding Direction:
⟹ Current time in India
=12:00p⋅m.
⇒ Time at required meridian
=7:00 a.m.
⇒ Difference in time
=5hrs, and thistime at meridian
(7:00a.m. ) is
5hrs behind.
Hence it is west direction. Note: When time on a meridian is lagging with respect to the time of others, then it lies to the west.
Calculation of Longitude:
As we know the Earth takes
24hrs.for one complete rotation, so
⟹24hrs.=360∘ ⇒1hr==15∘, thus the Earth rotates
15 degrees in
1hr.
⇒ In 5hrs=5×15∘=75∘ Hence at
75∘ West longitude, the time will be
7:00a.m.
