Joaquin wants to take his phone and his video game player on a trip. An hour bef

Question

Joaquin wants to take his phone and his video game player on a trip. An hour before they plan to leave, he realizes that he forgot to charge the batteries last night. At that point, he plugged in both devices so they can charge as long as possible before they leave. Joaquin knows that his phone has 40% of its battery life left and that the battery charges by an additional 12 percentage points every 15 minutes. His video game player is new, so Joaquin doesn't know how fast it is charging but he recorded the battery charge for the first 30 minutes after he plugged it in. How much time would Joaquin need to charge both of the devices fully?

Explanation / Answer

Dear Student Thank you for using Chegg !! For phone Initial Charge = 40 % Charging Rate = 12% in every 15 min Now the phone needs to be charged remaining 60% With the given rate , it will take (60/12)*(15) minutes for phone to e fully charged => It will take 75 minutes for phone to be fully charged For video game From table it is clear Initial Charge = 20 % Charging Rate = 12% in every 10 min Now the video game needs to be charged remaining 80% With the given rate , it will take (80/12)*(10) minutes for video game to be fully charged 66.66666667 minutes Now since both the devices are charged simultaneously , time taken for full charge is MAX (time taken by phone, time taken by video game) 75 minutes solution

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