CTET PAPER II 2019 · PYQ · Time Zones / Geography · medium
Assertion (A): It will be 7:30 p.m. in India, when it is 2:00 p.m. in London. Reason (R): India is located east of Greenwich at 82°30′E.
Answer
The correct answer is C: Both (A) and (R) are true and (R) is the correct explanation of (A).. Indian Standard Time (IST) is based on the 82°30′E meridian, which passes through Mirzapur near Allahabad. Since India is east of Greenwich (0°), the time in India is ahead of GMT.
A.(A) is true, but (R) is false.
B.(A) is false, but (R) is true.
C.Both (A) and (R) are true and (R) is the correct explanation of (A).✓ Correct
D.Both (A) and (R) are true, but (R) is not a correct explanation of (A).
Explanation
Indian Standard Time (IST) is based on the 82°30′E meridian, which passes through Mirzapur near Allahabad. Since India is east of Greenwich (0°), the time in India is ahead of GMT. The time difference is calculated as 82.5° × 4 minutes/degree = 330 minutes = 5 hours 30 minutes. So when it is 2:00 p.m. in London, it is 2:00 + 5:30 = 7:30 p.m. in India. Both (A) and (R) are true, and (R) correctly explains (A).
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