Reading Time: < 1 minuteOur heart beats 72 times per minute. In a day, it pumps 7000 litres of blood. My domestic water tank is of 1000 litres. The…
Good Old Stories
Reading Time: < 1 minuteOur heart beats 72 times per minute. In a day, it pumps 7000 litres of blood. My domestic water tank is of 1000 litres. The…