document.write( "Question 446847: one person with a skiploader requires 12 h to remove a large quantity of earth. a second, larger skiploader can remove the same amount of earth in 4 h. how long would it take to remove the earth with both skiploaders working together? \n" ); document.write( "

Algebra.Com's Answer #307735 by htmentor(1343) $\"\"$ $\"About$

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The first person's removal rate is 1 per 12 hours (e.g. 1 ton per 12 hrs)
\n" ); document.write( "The second person's removal rate is 1 per 4 hours
\n" ); document.write( "Working together their rate in equation form is:
\n" ); document.write( "1/12 + 1/4 = 1/12 + 3/12 = 4/12 = 1/3
\n" ); document.write( "This says that the removal rate working together is 1 (ton) per 3 hrs
\n" ); document.write( "Taking the reciprocal we get 3 hrs per 1 ton
\n" ); document.write( "Ans: 3 hours \n" ); document.write( "

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