Alarge tank can be filled with water in 15 hours. the same tank can be emptied by a drain pipe and 25 hours. if the drain pipe is open while the tank is being filled, how long does it take to fill the tank?

It take 37.5 hours to fill the tank

Step-by-step explanation:

Given:

Time Taken to fill the tank  =  15 hours

Time Taken to empty the tank = 25 hours

To Find:

Time taken to fill the tank when both the inlet and outlet is opened at the same time  = ?

Solution:

Let the time to fill the tank be x

In 15 hours the tap fills the tank

Rate at which the tank is filled  =

In 25 hours the tap empties the tank

Rate at which the tank is drained =

The net gain per minute on the total filling rate  is

=> Rate at which the tank is filled - Rate at which the tank is drained

=>

=>

=>

=> 10x  = 375

=>

=>x = 37.5

answer: there are 453.592 grams in a pound.

b. x + 1

step-by-step explanation:

i'am smart