Question

Vera is using her phone. Its battery life is down to $\frac{2}{5}$, and it drains $\frac{1}{9}$ every hour. How many hours will the battery last?

• A. $\frac{18}{5}$ hours
• B. $\frac{8}{5}$ hours
• C. $\frac{28}{5}$ hours
• D. $\frac{19}{5}$ hours

Answer 1

The correct option is A $\frac{18}{5}$ hours

Given,
Battery life of Vera's phone $=\frac{2}{5}$
Battery drains every hour $=\frac{1}{9}$
Now,
The battery will last for $=\frac{\frac{2}{5}}{\frac{1}{9}}$
$=\frac{2}{5}\times 9$
$=\frac{18}{5}$ hours