



 
Walter, ...7.92 inches inside diameter ... Ugh! Who made _that_ one up? Let's stick to one system of units. 1 inch = 2.54 cm [type "inch" into Google to get this if you don't know it] so 7.92 in. is how many cm?________________ Volume of a cylinder = length x area so we need to know area. Area = π r^{2} (you knew, right) so we need to know radius radius = diameter/2 = how many centimeters? __________ Now find the area ________________ and multiply by length ...and 22 km. long... There are 100 cm in a meter and 1000 m in a km so length in cm is ____________________ Multiply and get volume in cubic cm.___________ Now convert back [go to Google to find how many liters in a cubic foot; a liter is a thousand cubic centimeters.] And your answer ....in cubic feet of water _____________________ RD
Walter, After you have completed the steps outlined above not before you can check your answer using our volume calculator. Harley  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 