Question

A firm has tractors of four models a, b, c and

d. four tractors (two of model b and one each of models c and

d.plough a field in 2 days. two model a tractors and one model c tractor take 3 days to do this job. three tractors one each of models a, b and c take 4 days to do the same task. how long will it take to do the job if a team is made up of four tractors of different models?

Answer 1

what want to say nk jsjdnbskd