document.write( "Question 190650: Can someone please help me with this problem:\r
\n" ); document.write( "\n" ); document.write( "An airplane travels at constant speed for a distance of 120km it a time of 15 min. Its speed is:\r
\n" ); document.write( "\n" ); document.write( "a. 30 km/h.
\n" ); document.write( "b. 120 km/h.
\n" ); document.write( "c. 480 km/h.
\n" ); document.write( "d. 1800 km/h.
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Algebra.Com's Answer #143155 by orca(409)\"\" \"About 
You can put this solution on YOUR website!
Use this formula to find the speed:
\n" ); document.write( "speed = (distance traveled)/(time spent)\r
\n" ); document.write( "\n" ); document.write( "Before substituting the time into the formula, change the unit of time from minutes to hours.
\n" ); document.write( "15 minutes = 15/60 hour = 0.25 hour\r
\n" ); document.write( "\n" ); document.write( "Now
\n" ); document.write( "speed = 120/0.25 = 480 km/h.
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