Blueberries collecting

Marie collects blueberries 2 l in 1 hour. Began collecting at 8.00 pm, Joe collects 1.5 l in 1 hour. Peter 1 l for 1 hr. And they began to gather at 08.30 pm. Together they collect 10 l. At what time will they all have collected?


t = 10:30 hh:mm Wrong answer


2•(t-8.00) + (1.5+1)•(t-8.50) = 10

4.5t = 47.25

t = 212 = 10.5

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