câu 1: There is a tree 8m long. A carpenter wants to cut the tree into 16dm long logs. Knowing that, each time he saw 5 minutes, he saw a log, he rested for 3 more minutes. How long does it take for the carpenter to finish cutting the tree?
câu 1: There is a tree 8m long. A carpenter wants to cut the tree into 16dm long logs. Knowing that, each time he saw 5 minutes, he saw a log, he rested for 3 more minutes. How long does it take for the carpenter to finish cutting the tree?
8m=80dm
The times the carpenter finish cutting the tree is
80:16=5(times)
Because the Last cutting cut 2 logs so the carpenter finish cutting the tree with 4 times
It takes for the carpenter to finish cutting the tree :4.5+3=23(minutes)