Question

Some students washed 24 cars in 2 hours. how many cars can they wash in 15 hours?

a. 12
b. 48
c. 180
d. 360

Answer 1

itd be c.180 because itd be 12 cars each hour so times 12 by 15

Answer 2

option c is correct

180 cars can they wash in 15 hours

Explanation:

Unit rate defined as the rate are expressed as a quantity 1 such as 4 miles per hour or 5 meter per second.

As per the statement:

Some students washed 24 cars in 2 hours

Then by definition of unit rate.

`\text{unit rate per hour}=(24)/(2) = 12`

We have to find how many cars can they wash in 15 hours

⇒
`\text{Number of cars washed in 15 hours} = \text{Unit rate per hour} \cdot 15`

Substitute the given values we have;

`\text{Number of cars washed in 15 hours} = 12 \cdot 15`

Simplify:

`\text{Number of cars washed in 15 hours} = 180`

Therefore, 180 cars can they wash in 15 hours