Question

EXERCISE 8B
C
1. Determine if the following ratios are in proportion.
ar 20 g: 200 g, 700 g: 7 kg b. 500 ml : 750 ml, 80 kg : 100
400 m: 2 km, 60 cm: 200 m d. 50 men : 250 men, 15:20
er 50: 200, 20 m : 80 m
3:7 and 9:21
2. Find the value of x in each of the following proportions.
12: x = 3:9
b. X: 10 = 4:40
a.​

Answer 1

I am only answering one part of each.

Step-by-step explanation:

Ques:1 a)20g : 200g

20/200

1:10

Ques:2 a) 12:x = 3:9

product of extreme = product of mean

12×9 = X×3

12×9 / 3 = x

36 = x