At the equator earth's surface moves about 4000 kilometers per day.

a. what is this speed in kilometers per hour?

b. what is this speed in meters per minute?

A. There are 24 hours in a day, so we have to divide the speed by 24, so we get 166.67

b. Now, to get it in metres per minute, we have to multiply by 1000 (to convert kilometres to metres), and divide by 60 (to convert hours to minutes)

So, we get 2777.78 metres/minute

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