Question

pipe a can fill an Empty tank in 9 hours while pipe B can empty the full tank in 10 hours open thank how much time will they take to fill it up completely ​

Answer 1

Answer:

90hr

Step-by-step explanation:

let us assume that the tank has a volume of 90units

as 90 is the lcm of 9 and 10

pipe a fills the tank in 9hours

so the rate of filling is 90/9=10units/hr

pipe B empties the tank in 10hr

so the rate of emptying is 90/10=9units/hr.

so the average rate of increase in the tank volume is

10-9=1unit/hr.

to reach 90 units it will therefore take 90 hours.

hence total time required is 90hr.

Answer 2

Answer:

refers to the attachment