Ram completes a task in 10 hours and system also completes the same task in 15 hours. How much time they will take, if they work together ?
Answer: (1) 6 hrs.
Ram completes a task = 10 hours
A system also completes the same task = 15 hours
They will take time work together = 10 x 15/(10 + 15)
= 6 hrs.
Hence, the answer is (1) 6 hrs.