# Task № 1.4

## Condition:

At the potion-making exam, each student from Hogwarts School had to brew 10 potions. Hermione managed to complete the task in half an hour, Harry in 40 minutes, and Ron took 1 hour. How many potions would Ron, Hermione, and Harry brew together in 2 hours if they continued working at the same speeds?
Answer: 90

Exact match of the answer -1 point

Solution by analogy with task №1.1

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