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Objective Question & Answer

QUESTION

Objective Question

Q.1
The population of a town in three consecutive decades was 1 lakh, 1.1 lakh and 1.2 lakh respectively. The population of this town in the fourth consecutive decade according to geometric method would be
A
1.9 lakh
B
1.33 lakh
C

1.25 lakh
D
2.1 lakh
Answer ( Option B)

1.33 lakh

Solution

Decade

(1)

Population (Lakh)

(2)

Increase in population

(3)

% increase in population = growth rate%

=

 

1

1

0.1

10%

 

2

1.1

  

0.1

9.09%

  

3

1.2

 

Constant growth rate,

    

The population in the 4th decade

 

= 1.314 lakh 

Most close option is (b)

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