word problem_12_13_11

[ebrin]

I have to answer the following and I need help...

A grocery store parking lot can hold 1000 vehicles. 2/5 of the spaces are for cars. Went you went in to buy groceries, there were 200 cars and some trucks in the lot. The parking lot was 3/4 full. How many trucks were in it.?

 

[Mrspi]

I have to answer the following and I need help...

A grocery store parking lot can hold 1000 vehicles. 2/5 of the spaces are for cars. Went you went in to buy groceries, there were 200 cars and some trucks in the lot. The parking lot was 3/4 full. How many trucks were in it.?

What have you done so far?

We can't tell where you are stuck if we can't see any work on your part. You've posted this in the Pre-Algebra section...have you worked with solving equations?

Please repost, indicating what level of math class you are taking, and show us what you've tried. Then we will have some idea of how to help you.

 

[Deleted member 4993]

I have to answer the following and I need help...

A grocery store parking lot can hold 1000 vehicles. 2/5 of the spaces are for cars. Went you went in to buy groceries, there were 200 cars and some trucks in the lot. The parking lot was 3/4 full. How many trucks were in it.?

If the parking lot was 3/4 full - and it can hold 1000 vehicles - how many vehicles (cars + trucks) were there?

 

[soroban]

Hello, ebrin!

This is a problem in "common sense".
Exactly where is your difficulty?

A grocery store parking lot can hold 1000 vehicles.
2/5 of the spaces are for cars.
When you went in to buy groceries, there were 200 cars and some trucks in the lot.
The parking lot was 3/4 full.
How many trucks were in it?

Think about the capacity of the parking lot.

. . . . . \(\displaystyle \begin{array}{|c|c|} \hline & \\ 400 & 600 \\ \text{cars} & \text{trucks} \\ & \\ \hline \end{array}\)

. . . . . . \(\displaystyle \text{Total: 1000}\)



The parking lot was 3/4 full.
There were \(\displaystyle \frac{3}{4} \times 1000 \,=\,750\text{ vehicles.}\)

200 of them were cars.
. . How many were trucks?

. . . . . \(\displaystyle \begin{array}{|c|c|} \hline & \\ 200 & ? \\ \text{cars} & \text{trucks} \\ & \\ \hline \end{array}\)

. . . . . . \(\displaystyle \text{Total: 750}\)