Home
Class 7
MATHS
the population of a town increases 8% an...

the population of a town increases 8% annually if it present population is 142560 what was it a year ago?

Text Solution

AI Generated Solution

The correct Answer is:
To find the population of the town a year ago, we can use the formula for percentage increase. The present population is given as 142,560, and the population increases by 8% annually. ### Step-by-Step Solution: 1. **Understand the Problem**: We need to find the population of the town one year ago, given that the population increases by 8% annually. 2. **Set Up the Equation**: Let the population a year ago be \( X \). After a year, the population increases by 8%, which can be expressed as: \[ \text{Present Population} = \text{Previous Population} + \text{Increase} \] The increase can be calculated as \( 8\% \) of \( X \), which is \( 0.08X \). Therefore, we can write: \[ 142560 = X + 0.08X \] 3. **Combine Like Terms**: The equation can be simplified: \[ 142560 = 1.08X \] 4. **Solve for \( X \)**: To find \( X \), we divide both sides of the equation by \( 1.08 \): \[ X = \frac{142560}{1.08} \] 5. **Calculate \( X \)**: Now, we perform the division: \[ X = 132200 \] 6. **Conclusion**: The population of the town a year ago was \( 132200 \). ### Final Answer: The population of the town a year ago was **132,200**. ---
Promotional Banner

Topper's Solved these Questions

  • PERCENTAGE

    RS AGGARWAL|Exercise EXERCISE10A|16 Videos
  • PERCENTAGE

    RS AGGARWAL|Exercise EXERCISE10 B|27 Videos
  • MENSURATION

    RS AGGARWAL|Exercise TEST PAPER (True/False)|4 Videos
  • PROBABILITY

    RS AGGARWAL|Exercise EXERCISE|4 Videos

Similar Questions

Explore conceptually related problems

The population of a town increases by 8% annually. If the present population is 54000, what was it a year ago?

The population of a term increases by 6% annually . IF the persent population is 17490 . What was it a year ago ?

The population of a town increases by 10% annually. If the present population is 60000, what will be its population after 2 years?

The annual rate of growth in population of a town is 10%. If its present population is 33275, what was it 3 years ago?

The population of a town increases at 5% per annum . Its present population is 16000. what will ne its population after 2 years?

The population of a town increases by 25% annually. If the present population is one crore, then what was the difference between the population 3 years ago and 2 years ago ?

The population of a town increases by 5% annually. If the population in 2009 is 1,38,915 what was it in 2006

The population of a town increases by 5% annually. If its population in 2011 is 1,38, 920 what it will be in 2012?