Blueberries collecting

Marie collects 2 l of blueberries in 1 hour. She began collecting at 8.00 PM. Joe collects 1.5 l in 1 hour. Peter collects 1 l for 1 hour. They began to gather at 08.30 PM. Together, they collect 10 l. At what time will they all be collected?

Result

t = 10:30 hh:mm Wrong answer

Step-by-step explanation:


2·(t-8.00) + (1.5+1)·(t-8.50) = 10

4.5t = 47.25


t = 47.25/4.5 = 10.5

t = 21/2 = 10.5

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