Question

The present population of sasaram city is 100000. The population is increasing by 5% and 10% in 1st and 2nd year, then find the population after 2 years.
1. 150000
2. 105000
3. 115500
4. 155000

Answer 1

Correct Answer - Option 3 : 115500

GIVEN:

The present population of sasaram city = 100000 and The population is increasing by 5% and 10 % in 1st and 2nd year

FORMULA USED:

Net % Increase = x + y + xy/100

CALCULATION:

Net % Increase = x + y + xy/100

⇒ 5 + 10 + 5 × 10/100

⇒ 15 + .5

⇒ 15.5%

⇒ New Increased Population = Actual Population × Net % increased

⇒ 100000 × 115.5%

⇒ 100000 × 1155/1000

⇒ 115500