Question

A pond is being filled by two water lines.

Answer 1

Answer:

2hr

Step-by-step explanation:

Let x be the flow rate of the first line in kg/hr

Let y be the flow rate of the second line kg/hr

Let V be the volume of the pond. in kg

(2 hr)(x kg/hr) = V kg

(1 hr)(x + y kg/hr) = V kg

x + y = 2x

y = x

as the flow rates of the two lines is identical, the second line alone takes two hours to fill the pond.