Question

The rocket that carried the Curiosity Rover to Mars traveled at a speed of 21,000 miles per hour. What is this speed to the nearest mile per second?

Answer 1

Hi ,

We know that ,
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1 hour = 60 minutes

1 hour = 60 × 60 seconds -----( 1 )

[ since 1 minute = 60 seconds ]
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According to the problem given ,

Speed of the rocket = 21000 miles / hr

= ( 21000 miles ) / ( 3600 sec ) from ( 1 )

= 35 / 6 miles / sec

= 5.83333.... miles / sec

= 5.8 miles / sec

The speed of the rocket is ( nearst ) = 5.8 miles / sec

I hope this helps you .

:)

Answer 2

without an explanation your answer is 75,600,000

but if u want a explanation than here:

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You convert 21,000 mph into mps i.e. miles per second

so, you divide 21000 by 60x60 or 3600

⇒21000/3600

⇒5.83 mps

or

approximately 6 mps