document.write( "Question 880184: a man completes 30 km of a journey at the speed of 6 km/hr and the remaining 40 kms of the journey in 5 hrs.what is the average speed for the whole journey?
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\n" ); document.write( "b.5 9/11 km/hr
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\n" ); document.write( "d.7 1/2 km/hr \n" ); document.write( "

Algebra.Com's Answer #531263 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "Average speed = \r\n" );
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document.write( "We find the total DISTANCE traveled this way:\r\n" );
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document.write( "  \r\n" );
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document.write( "Since we are give both DISTANCES, we just add them\r\n" );
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document.write( "30km + 40km = 70km = total DISTANCE traveled on the entire journey\r\n" );
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document.write( "------------------\r\n" );
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document.write( "We find the total TIME traveled this way:\r\n" );
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document.write( "  \r\n" );
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document.write( "We are NOT given the TIME for the first part of the journey,\r\n" );
document.write( "So we must use TIME =  to find the TIME for\r\n" );
document.write( "the first part of the journey.\r\n" );
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document.write( "TIME for first part of journey =  = 5 hours\r\n" );
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document.write( "We ARE given the TIME for second part of journey = 5 hours\r\n" );
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document.write( "5hrs + 5hrs = 10hrs = total TIME traveled on the entire journey\r\n" );
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document.write( "Average speed =  =  = 7 km/hr\r\n" );
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document.write( "Edwin

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