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Given age ratios calculated through a span of 10 years.( before 6 and after 4)

Difference between ratio numbers is 6:5 and 11:10 is 11-6=10-5=5

Means for a span 10, the difference is taken as 5

Means multiplication factor is 2

So age 6 years before:12 and 10 Age

4 years hence: 22 and 20

So present ages are 18 and 16

Present age of sagar 16