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.
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 7.7 hr
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.
Pls explain better ๐๐
Please who understands this???
I didn't see the workings
Last explanation very explanatory.
Kudos