Let’s check our answer now.
Our answer for Jack’s mass is 35 kilograms.
We will use it to work backwards to find the total mass of the three boys.
Jack’s mass is represented by 7 units.
So, 7 units represent 35 kilograms.
1 unit represents
35 divided by 7
which is equal to 5 kilograms.
The total mass of the three boys which is represented by
22 units is given by
5 times 22.
This works out to be 110 kilograms
which is the same as that given in the problem.
Therefore, our answer is correct.
VO:
Now, let’s look at the last problem for this lesson.
This problem also involves the comparison of two pairs of quantities.