document.write( "Question 1016195: In a volcano, erupting lava flows continuously through a tube system about 21 kilometers to the sea. Assume a lava flow speed of 0.5 kilometer per hour and calculate how long it takes to reach the sea. \n" ); document.write( "
Algebra.Com's Answer #632611 by fractalier(6550)\"\" \"About 
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Distance = rate x time or d = rt...that means time t = d/r...and we have
\n" ); document.write( "t = 21 km / .5 km/hr = 42 hr
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