document.write( "Question 1188390: Two planes just took off from Boston, MA. The first plane İs traveling 3.5 times as fast as the second plane. After traveling in the same direction for 5 hours, they are 1312.5 miles apart. What is the average speed of each plane? (Hint: Since they are traveling in the same direction, the distance between them will be the difference of their distances.) \n" ); document.write( "

Algebra.Com's Answer #819480 by Alan3354(69443) $\"\"$ $\"About$

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Two planes just took off from Boston, MA. The first plane İs traveling 3.5 times as fast as the second plane. After traveling in the same direction for 5 hours, they are 1312.5 miles apart. What is the average speed of each plane?
\n" ); document.write( "(Hint: Since they are traveling in the same direction, the distance between them will be the difference of their distances.)
\n" ); document.write( "-------------------------
\n" ); document.write( "f = the speed of the fastest plane
\n" ); document.write( "s = the speed of the slower plane
\n" ); document.write( "----------
\n" ); document.write( "f = 3.5s
\n" ); document.write( "----
\n" ); document.write( "The separation in 5 hours = 5*(f-s) = 1312.5
\n" ); document.write( "f - s = 1312.5/5 = 262.5
\n" ); document.write( "3.5s - s = 262.5
\n" ); document.write( "s = 262.5/2.5 = 105 mi/hr
\n" ); document.write( "f = 367.5 mi/hr
\n" ); document.write( "===================================
\n" ); document.write( "Hint: We don't need hints. \n" ); document.write( "

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