Sarin learns Perimeter, Area and Volume in school part 90 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can acquire the skill of dealing with the Math Modeling, the Math Problem Solving and the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Area and shape.

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 UPQ405

Sarin used 10 identical 2-cm cubes to form the solid figure as shown below. He then painted the whole solid figure to green. If a tin of green paint can paint 8cm2 of surface, how many tins of paint does he need to paint the surface of the solid figure?

UPQ405-1

Solution:

            The number of 2-cm suface in the figure = 6 + 5 + 5 + 6 + 6 + 6 = 34

            The area of 1 2-cm surface = 2 × 2 = 4cm2

            A tin of green paint can 8cm2

            The number of surface can paint using a tin of paint = 8 ÷ 4 = 2

            The total number of paint required for the solid figure = 34 ÷ 2 = 17 tins

 More Questions on Area. Click here….

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