Question 1188646
In 1 hour, Maria can weed {{{1000/40=25}}} m<sup>2</sup>, and Bryant can weed {{{1000/20=50}}} m<sup>2</sup>.
Working together, they can weed {{{25+50=75}}} m<sup>2</sup> per hour.
Therefore, it will take them {{{10000/75=133&1/3}}} hours.