Question

1. Compare and classify the population densities shown in the squares ‘a’ and ‘b’ representing 1 sq. km of area.
2. If in figure B, one sign = 100, then what will be the sex ratio?

(a)

(b)

Answer 1

(a) In fig. (a) density of population is 7 persons per sq. km. The region is sparsely populated.

In fig. (b), the density of population is 18 persons per sq. km. The region is densely populated.

(b) Given that,

One sign= 100 persons.

Since there are 10 female signs, there are:

10 × 100 = 1000 females

Since there are 8 male signs, there are:

8 × 100 = 800 males

If number of males = 1000,

Then the number of females = ?

∴ Sex ratio = `(1000 xx 1000)/800`

= 1250

Sex Ratio is 1250 females per 1000 males.