MCQ Practice Math 📖 A can complete a piece of work in 12 days, A, B and C can complete the work in 6 days, Efficiency of B is 0.5 times the effi... 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 This question appeared in SBL JBL BKB BDBL Officer Question Bank 2019 Question 72 PreviousA boy goes to school at a speed of 5 km/h and returns to the village at a speed of 4 km/hr. If he takes 4 hours and 30 ... NextA can complete a piece of work in 12 days, A, B and C can complete the work in 6 days, Efficiency of B is 0.5 times the effi...