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Population growth is determined by age structure, which includes three categories: (i) Pre-reproductive (young individuals) (ii) Reproductive (mature individuals capable of reproduction) (iii) Post-reproductive (old individuals no longer reproducing) Expanding Population – More young individuals than mature ones, leading to future growth. Declining Population – Fewer young individuals than mature ones, leading to a decrease over time. Stable Population – Equal numbers of young and mature individuals, meaning birth and death rates are balanced, keeping the population size steady. Extinct Population – No individuals left in the population. Since the given scenario describes a balance between young and mature individuals, it indicates a stable population where the size remains constant over time. Hence, the correct answer is (3) Stable population.
A 240 m long train crosses a platform twice its length in 3 min. Find the speed of the train.
A train takes 18 seconds to cross a 120-metre-long platform. If the speed of the train is 36 km/h, then find the time taken by the train to cross a 240-...
Train ‘A’ running with a speed of 108 km/hr crosses a vertical pole in 8 seconds. Find the time taken by the train ‘A’ to cross a train ‘B’ ...
A train 150 m long running at 36 km/hr takes 50 seconds to cross a bridge. The length of the bridge is
A train can cross a pole, a bridge of 600 meter long and platform of 400 meter long in 13 seconds, _____ seconds and 29 seconds, respectively.
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Calculate the speed of a train in meters per second if it covers a distance of 20 kilometers in 12 minutes.
Two trains ‘A’ and ‘B’ started from station ‘P’ and ‘Q’ towards station ‘Q’ and ‘P’ respectively at the same time. When they met...
1260 metres long train crosses a man who is moving in the same direction with a certain speed in 30 seconds. If the same train can cross a pole in 21 se...
Two trains A and B, were proceeding in the same direction on parallel tracks at 26 km/hr and 80 km/hr respectively. A man noticed that it took exactly 1...
Two trains of same length are running in parallel tracks in the same direction with speed 26 km/hr and 80 km/hr respectively. The latter completely cros...
