Vera is using her phone. Its battery life is down to \dfrac25 5 2 start fraction, 2, divided by, 5, end fraction , and it drains another \dfrac19 9 1 start fraction, 1, divided by, 9, end fraction every hour. How many hours will her battery last?
Answers
Answered by
55
Battery is down currently = 2/5
Battery drains at the rate of 1/9 every hour.
Remaining battery life of Vera = 1 -2/5 = 3/5
Let y we the number of hours battery will last.
So, 1/9 y = 3/5
∴ y = 27/5
∴ y = 5 + 2/5 hours
∴ y = 5 hrs and 24 mins
So battery will last another 5 hrs and 24 mins.
Answered by
63
Answer:
18/5
Explanation:
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