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If an option writes mainland coastline as 7516.6 km what is the error?

Answer and explanation

Correct answer: It is not mainland coastline but total coastline including islands

The direct answer is A. The figure 7516.6 km is used for India’s total coastline, including the coastlines of the island groups, whereas the mainland coastline alone is approximately 6100 km in the standard school-geography figures. Therefore, if an option labels 7516.6 km as only the mainland coastline, it wrongly includes the islands without saying so. Option A is correct because it identifies exactly this error: the number belongs to the total coastline, not mainland-only coastline. Option B, land boundary, is wrong because a land boundary is a border with neighbouring countries and is usually given as about 15,200 km, not 7516.6 km. Option C, east-west extent, is wrong because that figure is about 2933 km. Option D, world share, is not a length measurement and does not explain the error. The reasoning is a comparison: mainland coast about 6100 km; total coast with islands 7516.6 km. Memory cue: mainland means only the continental shore; total coastline adds the islands. Always read words such as ‘mainland’, ‘total’, and ‘including islands’.

Related tags

Mainland CoastlineTotal CoastlineError

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