Charlie is preparing for a weightlifting competition. To qualify for the final, he needs to be able to lift at least 405 kg. Charlie is able to lift 185 kg comfortably now. Each month, he is able to increase the mass he lifts by 10 kg. How long must Charlie train to qualify for the final? Give your answer in years and months. (Eg 2 years 3 months)
Remaining mass that Charlie needs to be able to lift
= 405 - 185
= 220 kg

Number of months that Charlie must train to be able to lift the extra 220 kg 
= 220 ÷ 10
= 22 months

1 year = 12 months
22 ÷ 12 = 1 r 10

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

Answer(s): 1 years 10 months