Question

Population of village a and b increase by 10% and 20% respectively from 1999 to 2000and become equal in year 2000.find overall percentage increases in population from 1999 to 2000

Answer 1

20+10=30% is the answer

Answer 2

Answer:

Step-by-step explanation:

Pop. Of village A increased by 10%= 1/10

Pop. Of villg.B increased by 20%=1/5

Pop in 1999 for A is 10 and become 11 in 2000.....eq1 (bcz 1%increase in pop)

Pop. in 1999 for B is 5 and become 6 in 2000 ....eq.2

Now pop of Aand B in 2000 become equall by...×ly 6 to eq 1 and 11 to eq.2

I.e 66 for both villages in 2000

Now,

%age = 115-132/115×100

= 340/23%