Question

Choose the correct Answer:
31. Two taps fill a tank in 12 hours and 18 hours respectively. In how much
time will both taps fill the tank together?​

Answer 1

Answer:

EFFICIENCY OF ONE TAP = 1/12

EFFICIENCY OF SECOND TAP = 1/18

SO,

EFFICIENCY WHEN BOTH TAPS FILL TOGETHER = 1/12+1/18 (LCM OF 12,18=36)

= 3/36+2/36

= 5/36

= 72 hrs

SO,

IT TAKES 7.2hrs TO FILL THE TANK WHEN BOTH TAPS FILL TOGETHER!!!