In a pond there are 20 lotus plants last year and through reproduction 8 new plants are added, taking the current population to 28. What is the birth rate?

In a pond there are 20 lotus plants last year and through reproduction 8 new plants are added, taking the current population to 28, calculate the birth rate.

If in a pond there are 201 lotus plants of last year and through reproduction 8 new plants are added, then the birth rate is

If in a pond there were 50 fishes last year and through reproduction, 10 new fishes are added, taking the current population to 60. What will be the birth rate per fish per year?

In a pond there were 400 frogs last year and through reproduction 200 frogs are added taking current population to 600. The birth rate is

In a pond three were 400 frogs last year and through reproduction 200 frogs are added taking cunent populaJioll to 600. The birth rate is

In a pond, last year there were 30 lotus plants. Through reproduction, 25 new lotus plants were added in one year while 8 plants died. The birth and death rates for the lotus population respectively are _______and _____ individuals per lotus per year.