Mathematics
Grade6
Easy
Question
At the toy store we get 2 board games for $8.8. The cost of 5 board games will be _______________.
- 15
- 19
- 22
- 16
Hint:
In the question posed, we are given cost of 2 board games at a certain store. It is $8.8. We have to find cost of 5 board games given the rate is constant. From the first data, we can find out the rate. Using this value, we can find the required quantity.
The correct answer is: 22
Cost of 2 board games is $8.8.
We have to find the rate. We will find it by taking the ratio of the cost of board games and number of board games. As the rate is constant, we will use this value to find cost of 5 board games.
So the equation become
So the rate = $4.4 per board game
Let’s find the cost of 5 board games.
We will rearrange this for cost.
For this we will multiply both sides by ‘number of board games’.
Rate × number of board games = cost
Cost = Rate × number of board games
Substituting the values we have found
Cost = 4.4 × 5
Cost = $22
Therefore, cost of 5 board games is $22.
We have to be careful about units. Same quantities must have same unit.
