Answer:
2250 trees
Explanation:
Find how many eucalyptus trees are planted in an hour.
4 hours = 1000
1 hour = 1000 ÷ 4 = 250
20 pupils = 250
1 pupil = 250 ÷ 20 = 12.5 (in an hour)
30 pupils = 12.5 x 30 = 375 trees (in an hour)
6 hours = 375 x 6 = 2250 trees