Question

Pipes a and b can fill a tank in 20 hours. Pipes b and c can fill the same tank in 15 hours, while pipes c and a can fill the same tank in 12 hours. In what time can pipe a fill the same tank alone ?

Answer 1

Answer:

Step-by-step explanation:

A+b fill in 1hr1/20part

B+c fill in 1 he 1/15 part

C-a fii in 1 hr=1/15-1/20=1/60part

C+a fill in 1hr 1/12part

Adding 2c=1/60+1/12=6/60=1/10

C alone fill in 1hr1/20

Cwill fill alone 20hrs

Bill alone fill 1hr=1/15-1/20=1/20so b will take 20hrs

Afill in 1hr=1/12-1/20=2/20=1/10

So a Wii l take 10hrs to fill the tank