Question

While Flinn was starting the fire, his friends were collecting firewood. Flinn has 5 sticks. If he puts 3 sticks in the fire every minute, and his friends bring 7 sticks every minute, how many minutes will they need to make a pile of 45 sticks next to their fire?

Answer 1

Step-by-step explanation:

question is wrong ok please check it

Answer 2

They will need 10 minutes to make the pile of 45 sticks.

Step-by-step explanation:

Flinn already has 5 sticks. So, he has to get another (45 - 5) = 40 sticks to make a pile of 45 sticks next to their fire.

Now, he puts 3 sticks in the fire every minute, and his friends bring 7 sticks every minute, so effectively his stock of sticks is increasing by (7 - 3) = 4 sticks per minute.

Therefore, they will need $\frac{40}{4} = 10$ minutes to make the pile of 45 sticks. (Answer)