Question

Each cone of the hourglass has a height of 15 millimeters. The total height of the sand within the top portion of the hourglass is 45 millimeters. The radius of both cylinder and cone is 6 millimeters. Sand drips from the top of the hourglass to the bottom at a rate of 10π cubic millimeters per second. How many seconds will it take until all of the sand has dripped to the bottom of the hourglass? (picture coming in a sec)

Answer 1

option

Answer 2

126
108
18
29

Answer 3

gimme a good picture

Answer 4

Calculate the volume of sand, the cone will be completely filled and the cylinder will have sand up to the 30 mm level.
Volume of sand will = the volume of the cone: 1/3 * pi * (6 mm)^2 * 15 =
1/3 * pi * 36 * 15 =180 pi cubic mm the cylinder will have a volume of sand equal to:
pi * (6 mm)^2 * 30 mm=pi * 36 sq mm * 30 mm=1080 pi cubic mm.
The total sand is the sum: 1080 pi cubic mm +180 pi cubic mm = 1260 pi cubic mm.

Answer 5

dangggg

Answer 6

dangg indeed lol

Answer 7

the sand travels at a rate of 10 pi/sec so the sane will take (1260 pi)/10 pi/sec=
=126 seconds.

Answer 8

IQ level?>??????

Answer 9

hahhaha

Answer 10

over 9000