Ghazali

Electricity and Magnetism Level 3

Ghazali saad lamjarred I want to listen to above song(Ghazali) 100 times. What will be my remaining battery power after listen to the $\text{100}^{nth}$ time to Ghazali?(in percentage)

Assumptions:

My battery power remaining is 100%(full charges).
The time limit of song is (3minutes and 38 seconds).
Storage capacity of my (mp3) is 2300 mAh .
my device using $\approx$ (110.14)mAh for working in per hour.
The answer is $\text{}(a)$ . Input your answer as $\lfloor{}a{\rfloor}$

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The answer is 71.

1 solution

Matin Naseri
May 12, 2018

Details:

Time limit of song denote as $T_s$ .

Storage capacity of battery denote as $S_b$ .

Consumption of battery in each hour denote as $C_b$ .

$\boxed{solution}$

$T_s\cdot{}100=363.333$ .

$\frac{363.3333}{60}{\approx} 6.05555$

$C_b\cdot{6.05555}{\approx}666.95$

$S_b-666.95{\approx}1633.041$

$\frac{100}{2300}{\approx} 0.0434782609$

$1,633.041{\times}0.0434782609{\approx}71.0018$ .

$\lfloor{}71.0018{\rfloor}=71$

$\therefore$ the answer is $\color{#3D99F6}{\boxed{71}}$ .

Nice solution.

Tom Clancy - 3 years ago

But it's not 3.38 minutes per song. It's 3.63333. So it comes out to 69.7 percent remaining

Steven Chase - 3 years ago

Why This not 3.38 minutes per song?

Matin Naseri - 3 years ago

Because there are 60 seconds in a minute, not 100

Steven Chase - 3 years ago

@Steven Chase – I edited my solution and the problem.

Thank's.

Matin Naseri - 3 years ago

Ghazali

The answer is 71.

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