Question

20 men can cut 30 trees in 4 hour. If 4 men left the job , how many trees will cut in 6 hours

Answer 1

trees cut by 20 men in 1 hour=30/4=7.5
trees cut by 1 man in 1 hour= 7.5/20=3/8
trees cut by 16 men in 6hours=16*6*3/8=36

Answer 2

trees cut by 20 men in 1 hour=30/4=7.5
trees cut by 1 man in 1 hour= 7.5/20=3/8
trees cut by 16 men in 6hours=16*6*3/8=36