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Since 1999 , Roby has gained 2 kilograms of weight every year, In 2009 he was 25% heavier than in 1999 . How much did Roby weigh in 2005?

Since 1999 , Roby has gained 2 kilograms of weight every year, In 2009 he was 25% heavier than in 1999 . How much did Roby weigh in 2005? Correct Answer 92 kg

Total weight gain in 10 years = 10× 2 = 20 kg 25 kg gain if Robys weight is 100 kg 20 kg gain if Robys weight is ( 100×20)/25 = 80 kg In 2005 Robys weight = 80 + (6×2) = 92 kg

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