Question

Adrian exercised three days during the past week. He exercised 58 minutes and 45 seconds during the

first day, 40 minutes and 40 seconds on the second day, and 20 minutes and 35 seconds on the third
day. How many hours did he spend exercising during the week?

Answer 1

2h 1' 1"

Explanation:

1h = 1 hora

1' = 1 minute

1" = 1 secind

The sum of the three days is:

58' 45"

+ 40' 40"

20' 36"

= 118' 121"

118' 121" = 118' + 121"

1' = 60"

121" = 120" + 1" = (120/60) + 1 = 2' + 1"

Then:

118' + 121" = 118' + 2' ´+ 1" = 120' + 1"

1 h = 60'

(120/60) + 1 = 2h + 1'

then:

118' + 121" = 2h + 1' + 1"

= 2h 1' 1"