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If there are 250 snails in a pond, and within a year their number increases to 2500 by reproduction. What should be their birth rate per snail per year?
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Verified Answer
The correct answer is:
$9$
Birth rate $=\frac{\Delta \mathrm{N}}{\mathrm{N} \Delta \mathrm{t}}$
Here, $\quad N=250$
$\Delta t=1$ year
$\Delta N=2500-250$
$=2250$
Birth rate $=\frac{2250}{250 \times 1}$
$=9$
Here, $\quad N=250$
$\Delta t=1$ year
$\Delta N=2500-250$
$=2250$
Birth rate $=\frac{2250}{250 \times 1}$
$=9$
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