Page 99 - New Medley 5 Semester 2

(b) Ratio of girls to the total students = 14 : 42

14 1
= = = 1 : 3
42 3

(c) Ratio of boys to the total students = 28 : 42
28 2
= = = 2 : 3
42 3

EXERCISE 2.1

A. Express each of the following ratios in its simplest form.
1. 9 : 12 2. 12 : 21 3. 10 : 40 4. 30 : 50

5. 80 : 100 6. 49 : 63 7. 27 : 99 8. 36 : 132

B. Is it possible to find the ratio of the following? If yes, find the ratio.

1. 4 L to 20 m 2. 50 m to 150 m 3. 160 kg to 400 kg
4. 160 g to `200 5. 5 weeks to 14 days 6. 4 L to 750 mL

7. a paisa to a rupee 8. 9 mm to 6 cm 9. 1 h to 30 min

C. Write any three equivalent ratios to each of the following.

1. 1 : 3 2. 3 : 8 3. 6 : 18 4. 40 : 30

5. 4 : 12 6. 16 : 36 7. 120 : 360 8. 350 : 1400

D. Simmi is 15 years old and her mother is 45 years old. Compare their ages
using ratio.

E. Out of 40 students in a class, 24 are boys. On last Monday, only 32
students were present in which 12 were girls. Using this information,

find the ratio of:
1. Total girls : total students in the class

2. Total boys : total girls in the class
3. Present girls : present boys on Monday

4. Total students in the class : students present on Monday

5. Total girls in the class : present girls on Monday
6. Absent boys : total boys in the class

7. Absent girls : total absent students on Monday

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