Question

43. Two pipes can seperately fill a tank in 9
hours and 12 hours respectively. If both pipes are
in operation, the tank will be filled in​

Answer 1

Answer:

Pipe No.1 fills 1/9 or 4/36 rate per hour,

Pipe No. 2 fills 1/12 or 3/36 rate per hour.

The combined rates of both A & B pipes are 7/36 per hour

36 divided by 7 = 5 hours .8 minutes & 57 seconds ( 5.14285714285 hours)

Answer : The tank will be completely filled in 5 hours 8 minutes 57 seconds

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Answer 2

Step-by-step explanation:Pipe No.1 fills 1/9 or 4/36 rate per hour,

Pipe No. 2 fills 1/12 or 3/36 rate per hour.

The combined rates of both A & B pipes are 7/36 per hour

36 divided by 7 = 5 hours .8 minutes & 57 seconds ( 5.14285714285 hours)

Answer : The tank will be completely filled in 5 hours 8 minutes 57 seconds

                   

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