Answer :
The battery was charged at a rate of 2.2 percent per minute.It took the battery 35 minutes to be fully charged.
Answer:
The battery was charged at a rate of 2.2 % per minute.
It took 35 minutes to fully charge the battery
Step-by-step explanation:
Initial amount of charge = 23%
Charge after 30 minutes = 89%
Percentage of charge gained in 30 minutes = 89-23
= 66 %
Charging speed of battery = [tex]\frac{percentage\hspace{3}of\hspace{3}charge\hspace{3}gained}{time\hspace{3}taken\hspace{3}in\hspace{3}minutes}[/tex]
= [tex]\frac{66}{30}[/tex]
= 2.2 % per minute
2.2% charge takes 1 minutes
1% charge takes [tex]\frac{1}{2.2}[/tex] minutes
Initially it was 23% charged so it needs 77% more charge to be fully charged.
So, 77% charge takes [tex]\frac{1}{2.2}*77[/tex] minutes
= [tex]\frac{100}{2.2}[/tex] minutes
= 35 minutes