Question

If a population of 50 paramecia present in a pool increases to 150 after an hour, what would be the growth rate of population?

• A. 50 per hour
• B. 200 per hour
• C. 5 per hour
• D. 100 per hour

Answer 1

The correct option is A

Explanation of the correct answer:

1. The initial population at time 0 hr, $P_i$ = 50.

2. The final population after time 1 hr, $P_F$ = 150.

3. Growth rate of the population = $P_F-P_i÷Time$

4. $⟹(150-50)÷1$ = 100 per hour.
   

Explanation of the incorrect answers:

Option B:

1. The correct option is 100 per hour.

2. This is incorrect option.

Option C:

1. 200 cells will be produced in 2 hours.

2. Hence, this is incorrect option.

Option D:

1. 5 per hour is quite less.

2. Hence, this is incorrect option.

Final answer: If a population of 50 paramecia present in a pool increases to 150 after an hour then growth rate of population is 100 per hour.