Measurement Word Problems

Lesson 1

Problem: One train crosses the under bridge in every 20 minutes. How many trains will cross in four hours?

One hour has 60 minutes, 4 hours = 60 x 4 hours

Step 1: 240 minutes

One train crosses under bridge in every 20 minutes

Step 2: Number of train that cross in 240 minutes

                                               240/20 = 12 trains

Answer is: 12 trains

Try two practice problems: How many years ago were each event before 2008?

1 Satellites are invented in the year 1891.

2 Alarm clocks are invented in the year 1934.