Question

A tank can be filled by big pump in 20 hours and by a small pump in 80 hours.How long will it take to fill the tank both pumps together?​

Answer 1

Answer:

1/40 * 2/2 = 2/80. 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.

Answer 2

Answer:

1/40 * 2/2 = 2/80. 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.

Step-by-step explanation:

thanks.