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Frank can mow his own yard in 45 minutes. Joe's yard is 40% larger than Frank's, but Joe can mow his own yard in an hour. How long would it take them, working together, to mow both yards? Express your answer as mm:ss, where mm is the number of minutes and ss is the number of seconds, rounded to the nearest whole number, it would take them.

 Jan 8, 2019

Best Answer 

 #1
avatar+18346 
+1

Frank Rate =  1 yd / 45 min

 

Joe Rate    = 1.4 yd / 60 min

 

Total job = 1 yd + 1.4 yd = 2.4 yd

 

Time for both   =     2.4 yd /   (1/45 + 1.4 /60 ) = 52.68 min     =   52 min  41 sec     52:41

 Jan 8, 2019
 #1
avatar+18346 
+1
Best Answer

Frank Rate =  1 yd / 45 min

 

Joe Rate    = 1.4 yd / 60 min

 

Total job = 1 yd + 1.4 yd = 2.4 yd

 

Time for both   =     2.4 yd /   (1/45 + 1.4 /60 ) = 52.68 min     =   52 min  41 sec     52:41

ElectricPavlov Jan 8, 2019

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