S.chand publication New Learning Composite mathematics solution of class 8 Chapter 13 Data Handling Exercise 13B

 Exercise 13B

Question 1

Question 4

(a) Bird

(b) dog

Question 5

(a) Maridian

(b) (900 – 400) = 500 million people.

Question 6

(a) 5000 sq miles.

(b) largest lake area = 32,000 (Superior)

Smallest lake area = 75000 (Ontario)

∴ $\frac{32000}{7500}$ = 4.26 ∝ 4 times.

(c) (10,000 – 7500) = 2500

(d) Between Michigan & Huran.

Question 10

Class interval	Frequency
0 – 10	6
10 – 20	16
20 – 30	4
30 – 40	0
40 – 50	3
50 – 60	1

Question 11

Salary	15 – 20	20 – 25	25 – 30	30 – 35	35 – 40
Number of employees	35	30	45	40	10

Question 12

(a) 10 + 25 + 15 + 5 + 1 = 56

(b) (3 – 6) hr.

(c) (12 – 15) hours

(d) 5 time (∵ $\frac{25}{5}$= 5)