 Welcome to the session. I am Deepika here. Let's discuss the question which says the minute hand of a circular clock is 15 centimeter round. How far does the tip of the minute hand move in one hour? Take pi is equal to 3.14. Now we know that the distance around a circular region is known as a circumference and circumference of a circle is given by the formula 2 pi r. So this is a key idea behind that question. We will take the help of this formula to solve the above question. So let's start the solution. Now according to the question the minute hand of a circular clock is 15 centimeter long. This means the radius of the circular clock is equal to 15 centimeter. We have to find how far does the tip of the minute hand move in one hour. Now in one hour the minute hand of the clock will complete one whole circle. So the distance, the tip of the minute hand moving one hour is equal to circumference of the circle because according to our key idea the distance around the circular region is known as a circumference. Therefore the circumference of the circle is given by the formula 2 pi r. We have to take pi is equal to 3.14. So this is equal to 2 into 3.14 into 15 centimeter. So this is equal to and this is equal to 94.20 centimeter. Hence the tip of the minute hand will cover a distance of 94.20 centimeters in one hour. Hence the answer for the above question is 94.20 centimeters. I hope the solution is clear to you and you have enjoyed the session. Bye and take care.