Question

What is the time difference between the western most and eastern most tips of India

Answer 1

There is time difference of 2 hrs between the western most tip and eastern most tip of India.

Answer 2

There is time difference of 2 hours between the western most tip and eastern most tip of the India as the India's time meridian passes through Allahabad in Uttar Pradesh, roughly halfway between the country's westernmost and easternmost points.

EXPLANATION:

The time unit which follows by the whole country is Indian Standard Time (IST). The difference between the longitudes of the places which is  given by

$97.40238^{\circ}-68.03215^{\circ}=29.37023^{\circ} 97.40238^{\circ}-68.03215^{\circ}=29.3703^{\circ}$

So the time difference is:

$29.37023 \times 240 \text { seconds }=7048.85$ Seconds

Or 117minutes, 28.85 seconds.