Mathematics
Grade6
Easy
Question
At the market we get 5 bags of apples for $20. The cost of 8 bags of apples is ________________.
- 19
- 32
- 42
- 13
Hint:
In the question posed, we are given cost of 5 bags of apples at the market. It is $20. We have to find cost of 8 bags of apples 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: 32
Cost of 5 bags of apples is $20.
We have to find the rate. We will find it by taking the ratio of the cost of bags and number of bags. As the rate is constant, we will use this value to find cost of 8 bags of apples.
Let the number of bags of apples be denoted as ‘N’.
So the equation become
So the rate = $4 per bag
Let’s find the cost of 8 bags of apples
We will rearrange this for cost.
For this we will multiply both sides by ‘N’.
Rate ×N = cost
Cost = Rate × N
Substituting the values we have found
Cost = 4 × 8
Cost = $32
Therefore, cost of 8 bags of apples is $32.
We have to be careful about the units. Same quantities should have same units.
