If a human heart beats once in every 0.8 s, find the number of times it has beaten in the life of a 10 year old boy

Human heart beats one in 0.8s. Calculate how many times the human heart beats in the life of a person of 60 years.

The avarage life of an Indian is 56 years .Find the number of times the human heart beats in the life of an Indian ,If the heat beats once in 0.8 s.

Calculate the number of times a human heari beats in the life of 100 years old man. Time of one heart beat = 0.8s

Against an average pressure of 10 cm of mercury, a human heart pumps 50 cm^3 of blood in every beat. If the beat frequency is 72 per minute, what is the power of the heart?

For every 10^6 atoms of radium in a sample today, find the number of atoms that will be left after 3200 years. Assume half-life of radium to be 1600 years.

The average work done by a human heart while it beats once is 0.5 J. Calculate the power used by heart if it beats 74 times in a minute