Ratio and Proportion Practice Test 3

Question : 11 of 40

Marks: +1, -0

If (a + b) : (b + c) : (c + a) = 2 : 3 : 4 and (a + b + c) = 6, then the value of b is:

Solution:

Let

a + b = 2k, b + c = 3k

c + a = 4k

Then,

2(a + b + c) = 9k

So,

2 × 6 = 9k

4/3 = k

b+c=3k=3×4/3=4

Hence,

(a + b + c) - (b + c) = b

6 - 4 = b

2 = b

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