header bg

Scan QR code or get instant email to install app


In 18 hours, 42 trains pass near Emma’s house. How many trains pass near her house in 12 hours?

A 28 trains.

This is a proportion problem and the given information allows us to formulate the equation below:
42 trains/18 hours = x/12 hours
where x is the number of trains that pass near Emma’s house in 12 hours. We can solve this equation by first cross-multiplying.
18 hours × x = 42 trains × 12 hours
Carrying out the product on the right-hand side, we get:
18 hours × x = 504 trains·hours
We can solve for x by dividing both sides of the equation by 18 hours.
(18 hours × x)/18 hours = 504 trains·hours/18 hours
Carrying out the division, we get a 1 on the left-hand side and a 28 on the right-hand side.
1x= 28 trains
We can drop the 1 next to x, to get x= 28 trains. In 12 hours, 28 trains pass near Emma’s house.

Related Information


Anacaona Shipping

2 years ago

The best one

Michele Mamula

2 years ago

I would like an add free version, otherwise the app is wonderful so far

Schuyler Joel

2 years ago


Leave a Reply

Your email address will not be published. Required fields are marked *