Agartala is situated at an altitude of

Concept: The altitude (elevation) of a city is the height of its general ground level above mean sea level. For a settlement lying on a river flood plain, this value is small and is reported as a single representative figure for the urban area, conventionally rounded to the nearest whole metre.

Application: Agartala, the capital of Tripura, lies on the flood plain of the Howrah River in the western part of the state. Standard geographic references record its elevation as about 12.8 metres above mean sea level. Rounding 12.8 m to the nearest whole metre gives the representative altitude of 13 metres.

Cross-check: The fractional part 0.8 exceeds 0.5, so 12.8 m rounds up to 13 m, not down. This low value is consistent with a river-plain capital and is reported uniformly across standard gazetteers and encyclopaedic sources.