Question

Which of the following ratios are proportion 4,7,5,9. question answer
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Answer 1

Answer:

1234567890987654321

Answer 2

Step-by-step explanation:

i) 25cm:1m

1m=100cm

=\frac{25}{100}=\frac{1}{4}=1:4=

100

25

=

4

1

=1:4

rs40:rs160=\frac{40}{160}=\frac{1}{4}=1:4

160

40

=

4

1

=1:4

since the ratios are in proportion, therefore these are in proportion.

ii) 39litres:65litres=\frac{39}{65}=\frac{3}{5}

65

39

=

5

3

6bottles: 10bottles=\frac{6}{10}=\frac{3}{5}=3:5

10

6

=

5

3

=3:5

since, the ratio are equal, therefore thee are in proportion.

iii) 2kg: 80kg\frac{2}{80}=\frac{1}{40}=1:4

80

2

=

40

1

=1:4

25g:65g=\frac{25}{65}=\frac{1}{25}=1:25

65

25

=

25

1

=1:25

since, the ratios are not equal, therefore these are not in proportion.

iv) 200ml:2.5ltres

\frac{200}{2500}=\frac{2}{25}=2:25

2500

200

=

25

2

=2:25

4: 250=\frac{4}{50}=\frac{2}{25}=2:25

50

4

=

25

2

=2:25

sincce, the ratios are equal, therefore these are in proportion.