Question

John paints 3 rooms in 7 hours. At the same pace how long would it take him to paint 10 rooms?

Answer 1

23 hours and 33 minutes.
7/3 = 2.333
10 * 2.333 = 23.33

Answer 2

23 hours and 20 minutes I think. We already know that it takes him 21 hours to paint 9 rooms, so I multiplied 60 by 7 and got 420. I divided 420 by 3 and got 140. Which is 2 more hours and 20 minutes. Idk if it’s right but I tried