Question

a tank can be filled by pipe a in 20 hours and by a small pump un 80 hours

Answer 1

Answer:

• solve for time to get time = 1/(3/80) = 1 * 80/3 = 26 and 2/3 hours. when they work together they can fill the pipe in 26 and 2/3 hours. to confirm: rate of 3/80 of the pipe per hour times 80/3 hours = 1 full pipe.

༒HOPE SO IT HELPS YOU ༒