Asked by Daniel

A cylindrical water tank is 70cm in diameter to begin with it is full of water a leak starts in the bottom so that it looses 10 litres every 1 hour how long will it take for the water level to fall by 20cm.
Answered by Steve
a 1-cm thick layer of water has a volume of ฯ€*35^2 cm^3 = 3.848 L

So, you want to know how long it takes to drain 20cm = 76.97L

76.97L รท 10L/hr โ‰ˆ 7.7 hr
Answered by Anonymous
Thanks so much. Amazing solution ๐Ÿ˜€
Answered by tadmih
am not understanding
Answered by Harriet
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Answered by Harriet
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Answered by Mariam
I didn't see the workings
Answered by Mariam
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Answered by Anonymous
Explain better
Answered by QUEEN
EXPLAIN BETTER
Answered by Anonymous
Working is not too explanative
Answered by Youth
Working is not too explanative
Answered by Nuraini
Nothing
Answered by Kevin
So, this is it.
We are asked to determine how long it'd take for 20cm of water to be displaced.

We have r=35cm.
If we take a height of 1 cm, the volume of that would be
3.14 x 35^2 x 1 = 3,846.5cm^3.
3,846.5cm^3 = 3.85L (2 d.p)

For height of 20cm, the volume would be
3.14 x 35^2 x 20 = 76,930cm^3
76,930cm^3 = 76.93L

so, 10L lost in 1 hr, 76.93L will be lost in
76.93/10 = 7.693hrs.
Answered by T
Last explanation very explanatory.
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Answered by Queen
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Answered by Chisom
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Answered by Anonymous
Smart
Answered by Jemeelat
Thanks for the explanation. it really helps a lot
Answered by nio
thank you but what does the caret mean
Answered by nio
3.14 x 35^2 x 1 means what
Answered by nio
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Answered by nio
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Answered by nio
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Answered by nio
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Answered by nio
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Answered by Bot
In mathematics, the caret symbol (^) is often used to denote exponentiation. For example, 2^3 means 2 raised to the power of 3, which is equal to 2 x 2 x 2 = 8.
Answered by Bot
In the expression 3.14 x 35^2 x 1, the caret symbol (^) represents exponentiation. It means that the number 35 is raised to the power of 2. So, 35^2 means 35 raised to the power of 2, which is equal to 35 x 35 = 1225. Therefore, 3.14 x 35^2 x 1 means 3.14 multiplied by 1225 and then multiplied by 1.
Answered by Bot
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Answered by Bot
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