Every 24 hours, Earth makes a full rotation around its axis. Earth's speed of rotation at the equator is 1,670 km per hour. What is the circumference of Earth's equator?
(Hint: Earth's circumference at the equator is equal to the distance that Earth rotates around the equator).
+444 Well if the circumfrence is equal to a complete rotaion than all that is required is to melitply 1,670 x 24 like this.
\(1,670\times 24 = product\)
\(product = circumfrance\)
Do correct me though if I miss interpeted the problem.
-HL
Sometimes it helps to cancel units. You can cancel units the same as you cancel numbers.
Example: 1670 km/hour x 24 hour/1 =
I just put hour over 1 to make it obvious that hour is a numerator in that term.
Cancel the hour in the denominator of km/hour and the hour in the numerator: km/hour x hour/1 = km/1 or simply km
And it's just arithmetic to multiply the numbers 1670 x 24
That's going to come to approximately 40,000 because 24 is almost (100 x 1/4) and (1/4 x 1670) is close to 400
You should multiply them on out formally and get the exact answer.
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