Question
Figure H shows a closed rectangular tank of dimensions 42 cm by 42 cm by 90 cm with a cube of edge 20 cm glued to its bottom right corner. The tank contains 90 litres of water. Figure J shows the same rectangular tank lying on its side. Find the height of the water level, in centimetres, corrected to 2 decimal places.
3 m

Click button first when a symbol is required. X

Figure H shows a closed rectangular tank of dimensions 42 cm by 42 cm by 90 cm with a cube of edge 20 cm glued to its bottom right corner. The tank contains 90 litres of water. Figure J shows the same rectangular tank lying on its side. Find the height of the water level, in centimetres, corrected to 2 decimal places.