Question
David is preparing for a weightlifting competition. To qualify for the final, he needs to be able to lift at least 531 kg. David is able to lift 171 kg comfortably now. Each month, he is able to increase the mass he lifts by 20 kg. How long must David train to qualify for the final? Give your answer in years and months. (Eg 2 years 3 months)
3 m

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David is preparing for a weightlifting competition. To qualify for the final, he needs to be able to lift at least 531 kg. David is able to lift 171 kg comfortably now. Each month, he is able to increase the mass he lifts by 20 kg. How long must David train to qualify for the final? Give your answer in years and months. (Eg 2 years 3 months)