Question

If Soha’s heart beats 72 times in one minute. How many times does it beat in one hour?

Answer 1

Hint: To solve this question, we will use the concept of unitary method and multiplication. In this question, we have to calculate the number of times Soha’s heart beats in one hour. We know that 60 minutes is one hour. So, by multiplying the heart beats in one minute with 60, we will get the heart beats in one hour.

Complete step-by-step answer:
Before we proceed with the question, let us first understand the concept of unitary method. Unitary method is a method for solving a problem by first finding the value of a single unit and then finding the necessary value by multiplying it with the single unit value.
So, according to the question, Soha’s heart beats 72 times in one minute. So, in the next minute her heart will again beat for 72 times, and then again in the next minute for 72 times and so on.
Now, we know that there are 60 minutes in one hour. So if we have to count the heart beats of Soha in one hour, we will add 72 heart beats per minute for 60 times.
So, in 60 minutes, her heart beats will be,
72+ 72+ 72+ 72+ ………… 60 times
So, we can write this as 72 multiplied with 60 instead of adding 72 for 60 times.
So, Soha's heart beats in 60 minutes or one hour = $72\times 60=4320$.
Therefore, we get that Soha’s heart beats 4320 times in one hour.

Note: In this question, we can directly multiply the values as the single unit value is already given. But the students must note that, while solving other questions of this type, if the single unit value is not given, make sure to first find the single unit value and then multiply it with the required value to get the answer. Also, the students must make sure that they make no calculation errors while solving this question.