Question

If a human heart beats once in every 0.8 s, then

find the number of times the heart would have

beaten in the life of a 20 year old person

(1) 7.8 × 108

(2) 4.1 × 1011

(3) 1.32 × 1012 (4) 3.2 × 10​

Answer 1

IN 1 HOUR  HOW MUCH SECOND = 60*60

=3600

AND IN 1 DAY=3600*24

=8640

SO IN 365 DAYS(1 YEARS)=8640*365

=3153600

AND IN 20 YEARS NUMBER OF DAY=365*20

=7300(CONSIDER NO LEAD YEAR)

SECOND IN 7300 DAYS IS=7300*3153600

=23021280000 SECONDS

IN 0.8 SEC=23021280000 /0.8

==>28776600000