Question

When it is 12 noon at Greenwich, calculate the local time of a place located at 75°E longitude.​

Answer 1

Answer:

19 or 7 p.m.

Explanation:

If it is 12 noon at Greenwich, calculate the local time of the places located on the 69o E. 105o E = 105 x 4 = 420 minutes i.e., 420 ÷ 60 = 7 hours Time on Greenwich is 12:00. So, time on 105o E is 12 + 7 hours = 19 or 7 p.m.

Answer 2

Answer:

• The time will be 17:00(5 pm).

Explanation:

Given that:

• It is 12 noon at Greenwich.

To Find:

• Local time of a place located at 75°E.

As we know that:

• Between every longitude there is a difference of 4 minutes.
• Time decreases when we go towards west, while it increases when we go towards east.

So,

∵ Between every longitude there is a difference of 4 minutes.

∴ 75 × 4 = 300

Hence, time at 75°E is 300 minutes more than the time at Greenwich.

∵ 300 ÷ 60 = 5

Therefore, we can also say that time at 75°E is 5 hours more than the time at Greenwich.

Now,

∵ Time decreases when we go towards west, while it increases when we go towards east. And, because the place is at 75°E, where E represents East.

The time at 75°E will be:

(12:00 + 5:00) = 17:00

Hence the time will be 17:00 or we can say the time will be 5 pm.