Question

if a human heart beat once in a every 0.8s find the number of time it has beaten in the life of a 10 year old boy?

Answer 1

Give: time for 1 beat=0.8s

Number of beats per second =1/0.8

=1.25

To find number of beats in 10 yrs

Number seconds in 10 years=315360000s

Number beats beats in 10 yrs = number of seconds in 10 yrs x number of beats in 1 second

=> 31536000x1. 25

=> 394200000 times

This is the ans :-)