In a pond, there were 20 Hydrilla plants. Through reproduction, 10 new Hydrilla plants were added in a year. Calculate the birth rate of the population. [Delhi 2010]
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Answer:
Hydrilla plants in pond=20
New plants by reproduction=10
The birth rate of population= New plants/Old plants x 100
= 10/20 x 100
= 50%
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