Question

If it is 12 noon at Greenwich.calculate the local time of the places located on the following longitudes: 74°W, 105 E, 120°W ant parallels of latitudes​

Answer 1

Solution→

Every 1⁰ is equal to 4 minutes.

• If it is on West of Greenwich median then → Substract.

the calculated time from Actual Time of GMT .

and • if it is on East then → Add

74⁰ W = 74 × 4 = 296 minutes.... i.e. 4 hours 56 min.

♦ Time on Greenwich is 12 : 00 ..so the time on 74⁰ W is 12 - 4 hr 56 min = 7 : 04

Similarly, in case of 105⁰ E we have to add the time i.e.

105⁰ × 4 minutes = 420 min. I.e. 7 hours

12 + 7 hrs = 19:00

and for 120⁰W again,

120 × 4 min = 480 min... I.e. 8 hours

12 - 8 hours = 04 : 00 or 4 am

Note :

♦ Time I have followe-d is military time i.e. 24 hours clock.

♦ East or west of longitude measures from 0⁰

i.e. Greenwich Median Time

W = West direction

E = East direction