No, i haven't, who is Katie
Answer:
Did you mean to ask how many holes can the drill drill in 25 minutes, then the answer is 50
9 divided by 72 = 0.125
0.125 is the weight of one book
0.125 times 80 = 10kg.
So 80 books weight 10kg.
72 divided by 9 = 8 books make up 1 kg.
8 times 6 =48
You would write it 2=10(20+2)
