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avatar+203 

cold water fills the tub in 30 mins. Hot fills in 60 mins. If both are turned on, how long to fill the tub? 

 Feb 20, 2019
edited by bigbrotheprodude  Feb 20, 2019

Best Answer 

 #1
avatar+17331 
+5

Cold rate =  1tub/30 min

Hot rate   =  1tub/60 min

 

x min ( 1tub/30min + 1tub/60min) = 1tub

x(1/30 + 1/60) = 1

x(2/60+1/60) = 1

3/60 * x = 1

x = 60/3 = 20 minutes to fill tub when both are turned on

 Feb 20, 2019
 #1
avatar+17331 
+5
Best Answer

Cold rate =  1tub/30 min

Hot rate   =  1tub/60 min

 

x min ( 1tub/30min + 1tub/60min) = 1tub

x(1/30 + 1/60) = 1

x(2/60+1/60) = 1

3/60 * x = 1

x = 60/3 = 20 minutes to fill tub when both are turned on

ElectricPavlov Feb 20, 2019
 #2
avatar+203 
-1

nice thanks brother

 Feb 20, 2019

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