📅 NSB MS 2017🎓 MS🔄 Round 17#️⃣ Question 5🌟 Bonus✍️ Short Answer
Len takes 12 hours to clean a 40 by 50 room. Ben can clean the same room in 10 hours. To the nearest tenth of an hour, how long would it take them if they worked together?
✔️Answer:5.5
🚀
Take Your Prep to the Next Level
Practice with interactive modes, adaptive testing, and detailed stats on our main app.