Question

the average human heart beats at 72 times per minute . how many times does it beat in 15 seconds? how many in an hour? how many in a day

Answer 1

in 1 min(60 secs)=72 times
in 15 sec=(72/60)*15
             =18 times
in 1 hour(60 mins)=72*60
                          =4320 times
in 1 day(1440 mins)=1440*72
                             =103680 times

Answer 2

Answer:

In 15 seconds it beats 18 times.

In 1 hour it beats 4320 times.

In 24 hours it beats 103680 times.