Problema Solution
One drain pipe can empty a swimming pool in 6 h. Another pipe takes 3 h. If both pipes are used at the same time to drain the pool, what part of the job is completed in 2 h? in x h?
Answer provided by our tutors
The speed of working together is V
V = 1/6 + 1/3 = 1/2
So when t = 2h, 2*1/2 = 1, so 100% of the work can be completed in 2h if both are used