Express Speed in Different Units

We will discuss how to express speed in different units. Speed in km/hour can also be expressed in meter per minute or metre per second.

Now we will learn to express given speed in km per hour into speed in metre per minutes or metre per second.


For this, we should remember the following conversion:

1 km = 1000 m

1 m = \(\frac{1}{1000}\) km

1 minute = \(\frac{1}{60}\) hour

1 minute = 60 seconds

1 second = \(\frac{1}{60}\) minute

Solved examples to express speed in different units:

1. The speed of a train is 45 km per hour. Calculate its speed in metres per second.

1 km = 1000 m

1 hour = 60 minutes; 1 minute = 60 seconds

1 hour = 60 × 60 seconds

Speed of the train = \(\frac{45 km}{1 hour}\)

                         = \(\frac{45 × 1000 m}{60 × 60 sec }\)

                         = \(\frac{25}{2}\) m/sec

                         = 12\(\frac{1}{2}\) m/sec.



2. Convert the following speed as desired.

(i) 80 meter per minute into km per hour

Speed = distance/time

         = \(\frac{80 meters}{1 minute}\)

         = \(\frac{\frac{80}{1000 km}}{\frac{1}{60 hour}}\)

         = \(\frac{80}{1000}\) × \(\frac{60}{1}\) km per hour

         = \(\frac{24}{5}\) km per hour

         = 4\(\frac{4}{5}\) km/hr

(ii) 20 m/second into km/hour

1 km = 1000 m

or, 1 m = \(\frac{1}{1000}\) km

20 m = \(\frac{20}{1000}\) km

1 hour = 60 × 60 = 3600 seconds

1 second = \(\frac{1}{3600}\) hour

But speed = distance ÷ time

              = \(\frac{20}{1000}\) ÷ \(\frac{1}{3600}\)

              = \(\frac{20}{1000}\) × 3600 km/hour

              = 72 km/hour

Speed Distance and Time.

To find Speed when Distance and Time are given.

To find the Distance when Speed and Time are given.

To find Time when Distance and Speed are given.

Worksheet on Speed, Distance and Time.







5th Grade Numbers

5th Grade Math Problems

From Express Speed in Different Units to HOME PAGE




Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.



New! Comments

Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.

Share this page: What’s this?

Recent Articles

  1. What is a Triangle? | Types of Triangle | Scalene Triangle | Isosceles

    Jun 17, 24 11:22 PM

    What is a triangle
    A simple closed curve or a polygon formed by three line-segments (sides) is called a triangle. The above shown shapes are triangles. The symbol of a triangle is ∆. A triangle is a polygon with three s…

    Read More

  2. Interior and Exterior of an Angle | Interior Angle | Exterior Angle

    Jun 16, 24 05:20 PM

    Interior of an Angle
    Interior and exterior of an angle is explained here. The shaded portion between the arms BA and BC of the angle ABC can be extended indefinitely.

    Read More

  3. Angles | Magnitude of an Angle | Measure of an angle | Working Rules

    Jun 16, 24 04:12 PM

    Naming an Angle
    Angles are very important in our daily life so it’s very necessary to understand about angle. Two rays meeting at a common endpoint form an angle. In the adjoining figure, two rays AB and BC are calle

    Read More

  4. What is a Polygon? | Simple Closed Curve | Triangle | Quadrilateral

    Jun 16, 24 02:34 PM

    Square - Polygon
    What is a polygon? A simple closed curve made of three or more line-segments is called a polygon. A polygon has at least three line-segments.

    Read More

  5. Simple Closed Curves | Types of Closed Curves | Collection of Curves

    Jun 16, 24 12:31 PM

    Closed Curves Examples
    In simple closed curves the shapes are closed by line-segments or by a curved line. Triangle, quadrilateral, circle, etc., are examples of closed curves.

    Read More