A can repair 11 benches in an hour and B can repair 5 benches in an hour. Determine how much time they will require to repair 64 benches when they work together?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 4 hours.
A can repair 11 benches in an hour and B can repair 5 benches in an hour
Total benches = 64
Time taken by both = Total work/efficiency of both
Time taken to repair 64 benches = 64/(11 + 5) = 64/16 = 4 hours