An hourglass consists of two sets of congruent composite figures on either end. Each composite figure is made up of a cone and a

Question

2 years ago

9

An hourglass consists of two sets of congruent composite figures on either end. Each composite figure is made up of a cone and a

cylinder, as shown below: Hourglass with sand measuring 45 millimeters high © 2011 Jupiterimages Corporation 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? (4 points) Select one: a. 126 b. 108 c. 18 d. 29

Mathematics

1 answer:

VMariaS [17] · Answer 1 · 2022-06-15T07:08:11+03:00

VMariaS [17]2 years ago

3 0

Answer:

126

Step-by-step explanation:

Total volume of sand = pi/3*(6^2)*(15) + pi*(6)^2*(30) = 1260*pi mm^3

So it will therefore take 1260*pi/10*pi = 126 seconds for all of the sand from the top hourglass to drip down to the bottom hourglass.