The ratio of the ages of radha and rahul two years ago was 2:3, four years from now the ratio of their ages will be 3:4. find their present ages.
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Answer:
radha - 14 yrs
rahul - 20 yrs
Step-by-step explanation:
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answer
radha's age = 12 Rahul's age = 18
explanation
radha's present age = x
rahul's present age = y
2 years ago
x-2/y-2 = 2/3
3x-6 = 2y-4
3x-2y-2 (equation 1)
after 4 years
x+4/y+4 = 3/4
4x+16 = 3y+12
4x-3y+4 (equation 2)
equation 1 multiply by 4 ani equation 2 multiply by 3
12x-8y-8 = 12x-9y+12
-8y+9y = 12+ 8
y = 20
put y's value to equation 1
3x-2y-2 = 0
3x-2(20)-2=0
3x-40-2=0
3x-42=0
3×=42
×=14
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