MCQ Practice Mathematics 📖 A contractor employs 60 person for doing a job in 80 days. After 20 days it was found that only one-fifth of work was finishe... Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up PreviousA clock slows down one minute every 24 hours. How long will it take to slow down by one hour? NextA laborer is paid Tk.20 per hour for an 8-hour day. If he works overtime (above 8 hours) in a single day, he is paid 1.5 time...