a : (b + c) = 1 : 3 மற்றும் c : (a + b) = 5 : 7 எனில், b : (c + a) இன் மதிப்பு என்ன?

This question was previously asked in
RRB JE Previous Paper 5 (Held On: 23 May 2019 Shift 3)
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  1. 1 : 2
  2. 3 : 4
  3. 4 : 5
  4. 3 : 5

Answer (Detailed Solution Below)

Option 1 : 1 : 2
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a : (b + c) = 1 : 3 ---(1)

c : (a + b) = 5 : 7 ---(2)

சமன்பாடு (1) ஐ 3 ஆல் பெருக்கவும்

a : (b + c) = 3 : 9 ---(3)

சமன்பாடு (2) மற்றும் சமன்பாடு (3) இலிருந்து

c = 5 மற்றும் a = 3

a + b = 7

3 + b = 7

b = 7 - 3 = 4

இப்போது,

b : (c + a)

⇒ 4 : (5 + 3)

⇒ 4 : 8

⇒ 1 : 2
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