The population of rats in a locality increases by 20% in one year.Observing this, the pest control committee decided to use a special kind of pesticide `xyz' which effectively kills 160 rats in 3 months. Just after 2 years, what is the net increase or decrease in the population of rats if, initially the population of rats is 3200 and pesticide is used effectively?
| A. | Increase of 128 rats |
| B. | Decrease of 128 rats. |
| C. | Neither an increase nor a decrease in the population |
| D. | None of these |
Answer : C Explanation :
Growth rate of rat population in 3 months = 20 *(3/12) = 5% |
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Option: A Explanation : Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. Explanation will come here. |
