Question

two pipes AandB can fill empty tank in 8 hr and 12 hr respetively ,if the pipes are opened alternative ly every hour,the tank will be full earlier if​

Answer 1

Answer:

Step-by-step explanation:

Tank position at 3pm is

1/4 +1/12=4/12=1/3 full

To be filled is 2/3

All are open at 3pm

Effective filling per hour is

1/8 +1/12–1/6=(3+2-4)/24=1/24th per hour

Time to fill full is 24 hrs

Time to fill 2/3=24*2/3=16 hrs

Time of filling is next day morning 7 AM