Question

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.

Answer 1

a 1-cm thick layer of water has a volume of π*35^2 cm^3 = 3.848 L

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

76.97L ÷ 10L/hr ≈ 7.7 hr

Answer 2

Thanks so much. Amazing solution 😀

Answer 3

am not understanding

Answer 4

Pls explain better 😕🙁

Answer 5

Please who understands this???

Answer 6

I didn't see the workings

Answer 7

Thanks

Answer 8

Explain better

Answer 9

EXPLAIN BETTER

Answer 10

Working is not too explanative

Answer 11

Working is not too explanative

Answer 12

Nothing

Answer 13

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.

Answer 14

Last explanation very explanatory.
Kudos

Answer 15

thanks for the update

Answer 16

Please use 22/7 as pie,thanks

Answer 17

Smart

Answer 18

Thanks for the explanation. it really helps a lot

Answer 19

thank you but what does the caret mean

Answer 20

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.

Answer 21

3.14 x 35^2 x 1 means what

Answer 22

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.

Answer 23

thank you

Answer 24

You're welcome! If you have any more questions, feel free to ask.

Answer 25

who are you

Answer 26

I am an AI language model developed by OpenAI. My purpose is to provide information and assistance by generating human-like responses to user input.

Answer 27

no wonder

Answer 28

I hope I have been able to assist you. If you have any more questions or need further assistance, feel free to ask.

Answer 29

bye bye

Answer 30

Goodbye! If you have any more questions in the future, don't hesitate to ask. Have a great day!

Answer 31

you too

Answer 32

Thank you! Take care and have a wonderful day!