Consider the average life of an Indian to be 60 years. Determine the number of times the human heart beats in the life of an Indian. If beats once in 0.8 seconds.

Hint: Convert 60 years into seconds as it is given in the question that a human heart beats once in 0.8 seconds. Then, one can divide the 60 years time by 0.8 to find out the number of times human heart beats in 60 years.

Complete answer:
In the question, we are given that the average life of an Indian is 60 years
We know that there are 365 days in a year, and 24 hours in one day, so we can write
$\begin{align}
  & 60years=60\times 365days \\
 & \Rightarrow 60years=21900days \\
 & \Rightarrow 60years=21900\times 24hours \\
\end{align}$
Now, we will convert hours into minutes and then to seconds.
We know that 1 hr=60 min and 1 min =60 sec
So we get,
$\begin{align}
  & 60years=21900\times 24hours \\
 & \Rightarrow 60years=21900\times 24\times 60\times 60s \\
 & \Rightarrow 60years=1892160000s \\
\end{align}$
It is given that the heart beats once in 0.8 second, therefore, the number of times the human heart beats in 60 years will be $\dfrac{1892160000}{0.8}=2365200000$ times.
Thus, the human heart beats 2365200000 times in the life of an Indian of 60years if the heart beats once in 0.8 seconds.

Additional information:
A normal heart rate of adults ranges from 60 to 100 beats per minute at rest. Normally, a lower heart rate at rest implies more efficient heart function and healthier cardiovascular fitness. For example, a fit, trained athlete can have a normal resting heart rate closer to 40 beats per minute. To measure heart rate we can simply check our pulse. Place index and third fingers on your neck to the side of your windpipe. To check your pulse at your wrist, place two fingers between the bone and the tendon over your radial artery — which is located on the thumb side of your wrist.
When you feel your pulse, count the number of beats in 15 seconds. Multiply this number by four to calculate your beats per minute.

Note:
When you feel your pulse, count the number of beats in 15 seconds. Multiply this number by four to calculate your beats per minute. One must remember all the conversion values and special attention must be given while converting hours into seconds.