# The speed of light is 3.00x10^{8}m/s. How fast is this in mph? Use the conversion 1mile = 1610m.

**Solution:**

It is given that

Speed of light = 3.00 x 10^{8}m/s

Use the conversion

1 mile = 1610 m

The problem can be solved using the conversion of length and time units.

Let us consider

1 km = 1000 m

1 mile = 1610 m

1 hour = 60 minutes

1 minute = 60 seconds

1 hour = 3,600 seconds

By converting m/s to mph

= 3.00 x 10^{8} m/s x 1 mile/ 1610 m x 3,600 s/1 hour

By further calculation

= 3.00 x 10^{8} x 2.2360 miles/hour

= 6.708 x 10^{8} mph

Therefore, the speed of light in mph is 6.708 x 10^{8}.

## The speed of light is 3.00x10^{8}m/s. How fast is this in mph? Use the conversion 1mile = 1610m.

**Summary:**

The speed of light is 3.00x10^{8}m/s and in mph is 6.708 x 10^{8}.

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