Alanna can detail a car in 45 minutes. Robbie can detail a car in 30 minutes. If they work together, how many minutes does it ta
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Known, density= mass/ volume
The volume is given as 200ml
Set up an equation and cross-multiply
You get mass = 180g, answer is B
The volume is given as 200ml
Set up an equation and cross-multiply
You get mass = 180g, answer is B