Answer :
if it waters 1/18 of a lawn in 1/3 hours
then it waters 3/18 or 1/6 of a lawn in 1 hour
then 6 times (1/6) would be the full lawn
so 6 times (1) would be how many hours it would take
so it would take 6 hours
then it waters 3/18 or 1/6 of a lawn in 1 hour
then 6 times (1/6) would be the full lawn
so 6 times (1) would be how many hours it would take
so it would take 6 hours