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You can read posting Sarin learns Perimeter, Area and Volume in school(Math Concept) to learn the concept of perimeter and area.
Read also the posting on Sarin learns Shapes and Solids in school (Math Concept) to know about shapes.
Challenge yourself with the question before look out for the given solution‼!
Upper primary school mathematics question UPQ369
Diagram A shows a closed rectangular tank of dimensions 20 cm by 20 cm by 40 cm with a cube of edge 10 cm glued to its bottom left corner. The tank contains 12 litres of water.
Diagram B shows the same rectangular tank lying on its side. Find the height of the water level, in centimeters, corrected to 2 decimal places.
Solution:
The cube has each edge of 10cm
The area of a single face = 10 × 10 = 100cm2
Base on the diagram
Below the red line, the container has a base area of 20 × 40 = 800cm2
The volume of the container below the red line = 10 × 800 = 8000cm2
Above the red line, the container has a base area = 800 – 100 = 700cm2
The total amount of water = 12 l = 12000cm3
The amount of water above the red line = 12000 – 8000 = 4000cm3
The height of water in the container above the red line = 4000 ÷ 700 = 40/7 cm
The water level in the container position as diagram = 10 + 40/7 ≈ 15.71cm
Solving Primary School Mathematics 