Mathematics
Grade6
Easy
Question
Nathan paid $56.70 for 70 cans of juice. It would cost him ___________, if he were to buy 3 cans at the same rate.
- 2.5
- 3.12
- 2.43
- 2.7
- 2.43
Hint:
In the question posed, we are given cost of 70 cans of juice. It is $56.70. We have to find cost of 3 cans at the same rate. From the first data, we can find out the rate of a can. Using this value, we can find the required quantity.
The correct answer is:
- 2.43
Cost of 70 cans of juices is $56.70
We have to find the rate of per can. We will find it by taking the ratio of the cost of cans and number of cans.. As the rate is constant, we will use this value to find cost of 3 cans
So the equation becomes
So the rate = $0.81 per can
Let’s find the cost of 3 cans
We will rearrange this for cost.
For this we will multiply both sides by number of cans.
Rate × Number of cans = Cost
Cost = Rate × Number of cans
Substituting the values we have found
Cost = 0.81 × 3
Cost = 2.43
Therefore, cost of 3 cans of juices is $2.43.
We should be careful about the units. We should make sure that the units of same quantities are same.
