Gabriel is preparing for a weightlifting competition. To qualify for the final, he needs to be able to lift at least 584 kg. Gabriel is able to lift 144 kg comfortably now. Each month, he is able to increase the mass he lifts by 20 kg. How long must Gabriel train to qualify for the final? Give your answer in years and months. (Eg 2 years 3 months)
Remaining mass that Gabriel needs to be able to lift
= 584 - 144
= 440 kg

Number of months that Gabriel must train to be able to lift the extra 440 kg 
= 440 ÷ 20
= 22 months

1 year = 12 months
22 ÷ 12 = 1 r 10

Duration that Gabriel must train to qualify for the final = 1 years 10 months

Answer(s): 1 years 10 months