Question

A tap can fill a cistern in 8hr and another tap can empty it in 16hr. if both the tap are open, the time (in HR) taken to fill the tank
will be

Answer 1

Question:-) A tap can fill a cistern in 8hr and another tap can empty it in 16hr. if both the tap are open, the time (in HR) taken to fill the tank
will be??


$olution;-

Given:-) A tap can fill a cistern in= 8hr

Also,

Given:) another tap can empty it in 16hr

then.


According to the Question;-)


if both the tap are open, the time (in HR) taken to fill the

$0,,


=)1/8-1/16=2-1/16=1/16

then,

1 Hr =1/16

16 Hr



that's all


@ Sujeet Yaduvanshi

Answer 2

Tap A can fill the tank in 8 hours

⇒ 1 hour = 1/8 of the tank

.

Tap B can empty the tank in 16 hours

⇒ 1 hour = 1/16 of the tank

.

If Tap A and Tap B are both opened:

⇒ 1 hour = 1/8 - 1/16

⇒1 hour = 1/16 of the tank is filled

.

Number of hours needed to completely fill the tank

1/16 = 1 hour

16/16 = 1 x 16 = 16 hours

.

Answer: It takes 16 hours to fill the tank.