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Given below are two statements :

Given that a:b=5:3a: b=5: 3 and b:c=2:5b: c=2: 5, then value of ( cac-a ) will be equal to

Statement I: 10(a+c)10(a+c)

Statement II: 10a+25b10 a+25 b

In the light of the above statements, choose the correct answer from the options given below :

Solution

Correct Option: 2

Let me solve this step by step.

  1. Given ratios:
  • a:b=5:3a:b = 5:3
    • b:c=2:5b:c = 2:5
  1. From first ratio ab=53\frac{a}{b} = \frac{5}{3}
  • If we take b=6b = 6 (to make calculations easier)
    • Then a=10a = 10
    • These values maintain the ratio 5:35:3
  1. From second ratio bc=25\frac{b}{c} = \frac{2}{5}
  • With b=6b = 6
    • Then c=15c = 15
    • These values maintain the ratio 2:52:5
  1. Now we can find (ca)(c-a):
  • ca=1510=5c-a = 15-10 = 5
  1. Let's check Statement I:
  • 10(a+c)10(a+c)
    • 10(10+15)10(10+15)
    • 10(25)10(25)
    • 250250

This is not equal to (ca)=5(c-a) = 5

  1. Let's check Statement II:
  • 10a+25b10a+25b
    • 10(10)+25(6)10(10)+25(6)
    • 100+150100+150
    • 250250

This is not equal to (ca)=5(c-a) = 5

Therefore, both statements are false.

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