India and its neighbours

Direct answer: C, about two hours. India extends approximately from 68°7′E in the west to 97°25′E in the east, giving a longitudinal difference of about 29 degrees. Earth rotates through 360 degrees in 24 hours, so 15 degrees of longitude corresponds to about one hour, and one degree corresponds to four minutes. Multiplying 29 degrees by four minutes gives about 116 minutes, which is close to two hours. This is the natural local-time difference between the eastern and western extremes. India nevertheless uses one official standard time throughout the country, based on 82°30′E longitude, so clocks do not show this entire difference. A and B are too small, while D is too large. Memory cue: 1° longitude ≈ 4 minutes; 30° ≈ 2 hours.

The correct answer is C: India’s land boundary is approximately 15,200 km long. This figure refers to the international boundary along India’s mainland and its land borders with neighbouring countries; it should not be confused with the coastline. India shares land boundaries with Pakistan and Afghanistan in the northwest, China, Nepal and Bhutan in the north, and Bangladesh and Myanmar in the east. Option A is far too short, while B underestimates the total. Option D is an excessive figure and may result from confusing boundary length with a combined or imaginary measurement. The exact value may vary slightly by source and method, but 15,200 km is the accepted school-textbook approximation.

The governing concept is hemispheric location determined by latitude and longitude. The Indian mainland lies north of the Equator, because its latitudes are approximately 8°4'N to 37°6'N. It also lies east of the Prime Meridian, because its longitudes are approximately 68°7'E to 97°25'E. Consequently, option A, the Northern and Eastern Hemispheres, is correct. Options B and D incorrectly place the mainland in the Southern Hemisphere, while option C incorrectly places it west of the Prime Meridian. The island groups do not change the standard conclusion about the location of the Indian mainland. Reading the N and E signs on the coordinate values provides the direct reasoning.

The governing concept is the measurement of a country’s horizontal and vertical extent. A north–south length of 3,214 km and an east–west width of 2,933 km show that India occupies a substantial span in both directions. Hence, option A is correct. Option B is contradicted by the stated north–south length, which is itself more than 3,000 km. Option C is incorrect because these figures describe the territorial extent of India, mainly across its landmass, not an extension only into the sea. Option D is also inconsistent with dimensions of thousands of kilometres and India’s area of about 3.28 million square kilometres. The two measurements together demonstrate broad geographical extent.

Option A is the trap because it gives an area value with the unit kilometre rather than square kilometre. A kilometre measures one-dimensional length, such as a boundary or route, whereas area measures two-dimensional surface and must be expressed in square kilometres. India’s area is approximately 3.28 million square kilometres. The remaining statements use accepted geographical descriptions: India is seventh in the world by area and occupies about 2.4 percent of the world’s geographical area. The key examination skill is to check the unit before accepting a familiar number; a numerically familiar figure can still be wrong when its unit is incorrect.