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The ratio of Ganesh’s age and his mother’s age is 5:12.The difference of their ages is 21.The ratio of their ages after 4 years will be
  • a)
    3:7
  • b)
    6:11
  • c)
    4:7
  • d)
    19:40
  • e)
    None of these
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The ratio of Ganesh’s age and his mother’s age is 5:12.The...
Answer – D.19:40 Explanation : 12x – 5x = 21 7x = 21 X = 3
5:12 = 15:36
After 4 years = 19:40
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The ratio of Ganesh’s age and his mother’s age is 5:12.The...
Consider, Ganesh's age= 5x and His Mother's age=12x.
Difference = 12x-5x= 7x= 21.
Hence, x=3. 
Four years after, Ganesh's age= 5x+4 = 5(3)+4 = 19
His Mother's age= 12x+4 = 12(3)+4 = 40 
Hence, Ratio = 19:40 Option (D) 

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Community Answer
The ratio of Ganesh’s age and his mother’s age is 5:12.The...
's age to his sister's age is 3:2. If Ganesh is 15 years old, how old is his sister?

We can set up a proportion to solve the problem:

Ganesh's age / Sister's age = 3/2

We know that Ganesh's age is 15, so we can substitute that in:

15 / Sister's age = 3/2

To solve for Sister's age, we can cross-multiply:

15 x 2 = Sister's age x 3

30 = Sister's age x 3

Sister's age = 30 / 3

Sister's age = 10

Therefore, Ganesh's sister is 10 years old.
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The ratio of Ganesh’s age and his mother’s age is 5:12.The difference of their ages is 21.The ratio of their ages after 4 years will bea)3:7b)6:11c)4:7d)19:40e)None of theseCorrect answer is option 'D'. Can you explain this answer?
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