document.write( "Question 980744: if 1 tractor ploughs a field in 5.6 hours and another can plough the same field in 2.8 hours. How long would it take if both were working simultaneously to plough the field \n" ); document.write( "
Algebra.Com's Answer #601846 by macston(5194)\"\" \"About 
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\n" ); document.write( "Tractor 1: (1 field)/(5.6hrs)=0.179 field/hr
\n" ); document.write( "Tractor 2: (1 field)/(2.8hrs)=0.357 field/hr
\n" ); document.write( "Together: 0.179 field/hr+0.357 field/hr=0.536 field/hr
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\n" ); document.write( "To plow 1 field at 0.536 field/hr:
\n" ); document.write( "(1 field)/(0.536 field/hr)=1.87 hours\r
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