SOLUTION: You can wash a car in 25 minutes, your brotheew can wash a car in 15 minutes. How long does it take you both to wash a car? I tried to add the minutes together and divide by 2. I a
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Question 348008: You can wash a car in 25 minutes, your brotheew can wash a car in 15 minutes. How long does it take you both to wash a car? I tried to add the minutes together and divide by 2. I also tried taking the number in between 15 and 25. Answer by scott8148(6628) (Show Source):
You can put this solution on YOUR website! each sibling washes a FRACTION of the car based on their individual time
___ the fractions sum to one (the WHOLE car)
where x is the time together ___ (x / 25) + (x / 15) = 1
