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  1. wotcha's Avatar
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    #1

    at the speed of/ at speeds of ?

    1) People can roll down a great big hill at the speed of over 30 km per hour without being hurt.

    2) People can roll down a great big hill at speeds of over 30 km per hour without being hurt.


    Which is correct?

  2. 5jj's Avatar
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    #2

    Re: at the speed of/ at speeds of ?

    Quote Originally Posted by wotcha View Post
    1) People can roll down a great big hill at the a speed of over 30 km per hour without being hurt.

    2) People can roll down a great big hill at speeds of over 30 km per hour without being hurt.
    'The' is not correct.

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    #3

    Re: at the speed of/ at speeds of ?

    You can only use "the" when reffering to a pre-determined speed:

    "Electromagnetic radiation -- from radio waves to x-rays -- travel at the speed of light."

    "
    You can't travel at the speed of sound without a protective envelope."

    You use at speeds of over, for speeds above a base refference, as in your example:

    "People can roll down a great big hill at speeds of over 30 km per hour without being hurt."

    M.
    Last edited by Mannysteps; 14-Jun-2011 at 08:54. Reason: Desambiguation

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