RATIO & VOLUME Online Questions

* A REMINDER:  You will only be tested till VOLUME OF SOLID for SA1. That is why I did not teach you volume of liquid yet. We'll cover that after the exam.


Below are a few important RATIO & VOLUME questions which you'll see appearing in exams VERY OFTEN, even up to PSLE.

You MUST know how to do these. Once you know the strategy, it's VERY SIMPLE.

Do it in your Math Journal/Fullscap with the title:

Ratio & Volume Online Questions

1) The ratio of the area of Rectangle A to the shaded part is 7 : 3. The ratio of the area of Rectangle B to the shaded area is 5 : 2. What is the ratio of the area of Rectangle A to that of the area of Rectangle B?

2) Zhi Yin bought some magazines and comics in the ratio 1 : 3. The ratio of the number of comics she bought to the number of story books she bought was 2 : 5. Find the ratio of the number of magazines to the number of comics to the number of story books.




3) The ratio of Tabitha's Savings to Ken En's savings is 2 : 3. The ratio of Ken En's savings to Cassandra's savings is 4 : 7. Cassandra saved $1235 more than Tabitha. Find the total savings Cassandra and Ken En have.



4) During a fundraising event, Desiree and Wen Xin collected some $2 and $5 notes in the ratio of 8 : 11. They collected 48 $2 notes. How much money did they collect altogether?




5) Min Han had a piece of wire which is 260cm long. He used it to form a rectangle with its length and breadth in the ratio of 2 : 3. Find the length of the rectangle.




6)  _____ :  60   =  30 :  25.  What is the missing number in the box?




7) Find the volume of a cube given that the total area of its 6 faces is 726 cm2.  (In the previous post, the number given is wrong so it can't be solved.)




8) The volume of Figure A is 513 cm3.

   Find the total surface area of 1 cube.