Question

(03.02 MC)The table shows the battery life of four different mobile phones:

Mobile Phone Battery Life
Phone Battery Life (hours)
A 20
B 25
C 10
D 18


If 8.45% of the battery life of each mobile phone is used in a day by a typical user, for which mobile phone is 2.1 hours of battery life used in a day?
Phone A
Phone B
Phone C
Phone D

Answer 1

B = 25

Explanation:

x/100×8.5=2.1

8.5x/100=2.1

8.5x=100×2.1

8.5x=210

8.5x/8.5=210/8.5

x=24.70

x=25