Question

what are the time zones why do we need them​

Answer 1

Answer:

There are 24 time zones in the world..Russia has 11 time zones..

Explanation:

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Answer 2

ANSWER:-

Our earth rotates on its own axis. Due to this rotation, different parts of the earth receive different amounts of sunlight, thus causing morning, noon, evening and night. Now, if we had one time zone, then 12 pm would be noon at some places, but it would be night or evening at other places which would be inconvenient.