Question

A water tank can be filled in 7 hours by 5 equal sized pumps working together. How much time will 7 pumps take to fill it up.





please solve this hurrily.​

Answer 1

Step-by-step explanation:

from which class this question

Answer 2

Answer:

let the volume of tank be V liters

it is given

5 pumps take 7 hour to fill V liters

that is

5 pumps will fill V liters in 7 hour

so,

5 pumps will fill (V/7) liters in one hour

1 pump will fill ( V/7)/5) liters in 1 hour

1 pump will fill V/35 liters in 1 hour

so,

7 pumps will fill 7(V/35) liters in one hour

7 pumps will fill V/5 liters in 1 hour

7 pumps will fill 5 (V/5) liters in 5( 1 hour)

7 pumps will fill V liters in 5 hours