Question

Maria gets up in the morning and checks her watch against the TV, and sets the time to 7:00 am. School is
over at 3:00 pm. But when Maria checked her watch right after school, it showed 2:20 pm. If Maria's watch
slows down same amount of the time each hour, how many minutes does her watch slow down each hour?
a)5 minutes
b) 10 minutes
c) 6 minutes
d) 15 minutes​

Answer 1

Answer:

option a

5 min / hour

Step-by-step explanation:

• from 7:00 am to 3:00 p.m = 8 hours
• time in her watch is 2:20 p.m
• so time lag is 40 min

$= \frac{40 \: min}{8 \: hr} \\ = 5 \: min \: per \: hour$