Question

The heart beats 72 times in a minute . How many times it beats in a week

Answer 1

heart beat in a minute = 72 times
heart beat in 1 hour= 72×60=4320
heartbeats In a day =4320×24=103680
heartbeats in a week=103680×7=725760

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Answer 2

1 hour = 60 minutes
1 day = 24 hours
24 hours = 24*60 minutes
= 1440 minutes
7 days = 7*1440 minutes
=10080 minutes
the heart beats 72 times a minutes
it would beat 10080*72 in 7 days
= 725760 times in 7 days