document.write( "Question 985093: Kali left the White House and traveled toward the lake. Ndiba left one hour later traveling 15 mph faster in an effort to catch up to her. After two hours Ndiba finally caught up. What was Kali's average speed?\r
\n" ); document.write( "\n" ); document.write( "The answer is 30 mph but I have no idea how to get there. Please help!\r
\n" ); document.write( "\n" ); document.write( "All I have so far is this:\r
\n" ); document.write( "\n" ); document.write( "n = k + 15\r
\n" ); document.write( "\n" ); document.write( "Is that even correct? Thank you! \n" ); document.write( "

Algebra.Com's Answer #605941 by MathTherapy(10555) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "Kali left the White House and traveled toward the lake. Ndiba left one hour later traveling 15 mph faster in an effort to catch up to her. After two hours Ndiba finally caught up. What was Kali's average speed?\r
\n" ); document.write( "\n" ); document.write( "The answer is 30 mph but I have no idea how to get there. Please help!\r
\n" ); document.write( "\n" ); document.write( "All I have so far is this:\r
\n" ); document.write( "\n" ); document.write( "n = k + 15\r
\n" ); document.write( "\n" ); document.write( "Is that even correct? Thank you!
\n" ); document.write( "

What you have so far is Ndiba's speed, relative to Kali's, which is okay but you have to proceed
\n" );
document.write( "from there to solve for Kali's speed\r
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document.write( "\n" );
document.write( "Let Kali's average speed, be S
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document.write( "Then Ndiba's is: S + 15
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document.write( "Time taken for Ndiba to get to catch-up point: 2 hours
\n" );
document.write( "Time taken for Kali to get to catch-up point: 3 (2 + 1) hours
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document.write( "When Ndiba catches up to Kali, both would've travelled the same distance, and so, we get: 
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document.write( "3S = 2(S + 15)
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document.write( "3S = 2S + 30
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document.write( "3S - 2S = 30
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document.write( "S, or Kali' speed =  mph \n" );
document.write( "

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