Posted by **Ashley** on Saturday, May 19, 2007 at 11:36am.

If a person cross-country ski for 15 minutes, how many calories will be burned?

rate of sking is 700 cal/h

would I take

700cal over 1 h times x over .25?

Yes. That ratio works.

como sacar el ratio y proporciones gracias

como sacar el radio

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