keshaayro8566
30.11.2019 •
Mathematics
What volume of water will fit inside a cylindrical barrel that has a total surface area of 1885 in2 and a radius of 10 inches?
6283 in3
20 in3
1885 in3
18850 in3
Solved
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Ответ:
V=Area base*h
Total surface area=top area+bottom area+lateral area=2*pi*r^2+pi*r*h. So
1885=2*pi*10^2+2*pi*h*r
Solving for h, h=20. So the volume is,
V=pi*10^2*200=6283 in^3
Ответ:
Brielle will run the marathon faster.
Brielle = 104.8 minutes
Joshua = 157.2 minutes
Step-by-step explanation:
Speed rate = distance /time
Brielle = 1.25 /10 = 0.125 miles per minute
Joshua = 1.5/18 = 0.083333 =1/12 miles per minute
Since 0.125 (Brielle) > 1/12 (Joshua)
Brielle will run the marathon faster.
To calculate the time that takes each one to run the entire race (13.1 miles)
Time= distance / speed
Brielle = 13.1 /0.125 = 104.8 minutes Joshua = 13.1 / (1/12)= 157.2 minutesFeel free to ask for more if needed or if you did not understand something.