document.write( "Question 975161: a car traveling with 5/7 of its acual speed covers 42 km in 1 hr 40 min48 sec.what is the actual speed of the car? \n" ); document.write( "

Algebra.Com's Answer #596968 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+s+\"$ = actual speed in km/hr
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\n" ); document.write( "Convert time to hrs
\n" ); document.write( " $\"+40%2F60+=+.6667+\"$ hrs
\n" ); document.write( " $\"+48%2F3600+=+.01333+\"$ hrs
\n" ); document.write( " $\"+1+%2B+.6667+%2B+.01333+=+1.68+\"$ hrs
\n" ); document.write( " $\"+42+=+%28%28+5%2F7+%29%2As+%29%2A+1.68+\"$
\n" ); document.write( " $\"+7%2A42+=+5s%2A1.68+\"$
\n" ); document.write( " $\"+294+=+8.4s+\"$
\n" ); document.write( " $\"+s+=+35+\"$
\n" ); document.write( "The actual speed is 35 km/hr
\n" ); document.write( "----------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+%28+5%2F7+%29%2A35+=+25+\"$ km/hr
\n" ); document.write( " $\"+42+=+%28%28+5%2F7+%29%2As+%29%2A+1.68+\"$
\n" ); document.write( " $\"+42+=+25%2A+1.68+\"$
\n" ); document.write( " $\"+1.68+=+1.68+\"$
\n" ); document.write( "OK
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