The volume of a 12 inch x 12 inch pipe is: 1,360 cubic inches
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Volume = cross-section area*length
Assuming the 12" pipe means 12" internal diameter, giving us a 6" radius: Volume of a cylinder is (pi) r^2 h (3.14) (6*6) (12) = (3.14) (36) (12) = 1356.48 cubic inches.
The volume of the pipe is 1,154.5 cubic feet.
measure the radius of the pipe. (half the diameter - the width of the pipe) then measure the length of the pipe. then use the formula pi (3.14) x radius2 x length. the answer is the volume in the pipe
Answer:10/3 hour = 3 Hour and 20 minutesSolution:the volume of cistern (V) = 1 volume unitflow rate of pipe A = 1/6 V/hourflow rate of pipe B = 1/8 V/hourVolume filled = flow rate * timein the first two hours the volume filled = 1/6 * 2 + 1/8 *2 = 7/12 V.Remaining Volume = 1-7/12=5/12the folw rate after two hours = 1/8 (just pipe B)required time for pipe B to fill the cistern = Volume / flow rate of the pipe B= 5/12 divided by 1/8= 5/12 * 8/1 = 10/3 hours = 3 and 1/3 hours = 3 hours and 20 minutes.Check:if the answer is correct the volume should be 1:Total volume = 1/6*2 + 1/8*2 + 1/8*10/3 = 1.so, the answer is correct.Cheers!