As India’s standard time has been taken, at 82°30’ from the Naini village of Allahabad. So the difference between Ahmedabad and Indian Standard Time=82∘30I−72∘30I =10° ∴Difference in Time on 1° longitude = 4 minutes ∴Time 10° longitude = 40 minutes ∴Ahmedabad is situated on the East of Allahabad. ∴Time of Ahmedabad will be =08:00–00:40 =7:20am