SOLUTION: A tank, with a square base of side 30cm, was 20% filled with water. After 36L of water were added to it, the tank was completely full. What was the height of the tank?

Question 354519: A tank, with a square base of side 30cm, was 20% filled with water. After 36L of water were added to it, the tank was completely full. What was the height of the tank?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
square base 30 cm by 30 cm
..
let the height be h cm
volume of tank = 30*30*h
= 900h cu.cm
...
volume of water in tank = 20% of 900h cu.cm
= 180h cm^3
five times 180h will fill the tank.
full tank = 900h cm^3
..
1000 cm^3 = 1 liter
36 L = 36000 cm^3
...
900h =36000
h=36000/900
h=40 cm
RELATED QUESTIONS
Hi 4/7 of a rectangular tank with a base area of 2000 cm^2 was filled with water.... (answered by mananth)

Hi a tank with a square base of sides 10cm was 3/4 filled with water. Half the amount of (answered by Theo)

A rectangular tank measuring 80cm by 50cm by 40cm was 1/4 filled with water. 4 identical... (answered by ikleyn)

A rectangular tank with a square base initially contained 2.6 liters of water. A cube of... (answered by ankor@dixie-net.com)

A rectangular tank with a square base initially contained 2.6 liters of water. A cube of... (answered by Boreal)

A tank measures 40cm by 30cm by 20cm. It was half filled with water, when a rock was put... (answered by ikleyn)

A rectangular tank measures 4m long, 2m wide and 4.8m high. Initially it is half filled... (answered by ankor@dixie-net.com)

A rectangular tank measures 4 m long, 2 m wide and 4.8 m high. Initially it is half... (answered by Cromlix)

Hi A rectangular tank of height 120cm is half filled with water. When 62.6 litres of... (answered by ikleyn)