Calculating the Time to Knit a 160 cm Scarf

Oct 13, 2025 by wbrum.org 47 views

Introduction

In this problem, we are given that Pat can knit 2 cm in 35 minutes. We need to express this rate in two different units: minutes per centimeter (min/cm) and millimeters per minute (mm/min). Additionally, we will calculate how long it will take Pat to knit a scarf that is 160 cm long.

Expressing the Rate in Minutes per Centimeter (min/cm)

To express the rate in minutes per centimeter, we need to divide the time it takes to knit 2 cm by the length of the scarf. In this case, the time is 35 minutes, and the length is 2 cm.

\text{Rate in min/cm} = \frac{\text{Time in minutes}}{\text{Length in cm}} = \frac{35}{2} = 17.5 \text{ min/cm}

Expressing the Rate in Millimeters per Minute (mm/min)

To express the rate in millimeters per minute, we need to convert the length from centimeters to millimeters. Since there are 10 millimeters in 1 centimeter, we can multiply the length in centimeters by 10 to get the length in millimeters.

\text{Length in mm} = \text{Length in cm} \times 10 = 2 \times 10 = 20 \text{ mm}

Now, we can divide the length in millimeters by the time in minutes to get the rate in millimeters per minute.

\text{Rate in mm/min} = \frac{\text{Length in mm}}{\text{Time in minutes}} = \frac{20}{35} = 0.5714 \text{ mm/min}

Calculating the Time to Knit a 160 cm Scarf

To calculate the time it will take Pat to knit a scarf that is 160 cm long, we can use the rate in minutes per centimeter. We can multiply the length of the scarf in centimeters by the rate in minutes per centimeter to get the total time in minutes.

\text{Time in minutes} = \text{Length in cm} \times \text{Rate in min/cm} = 160 \times 17.5 = 2800 \text{ minutes}

Since there are 60 minutes in an hour, we can convert the time from minutes to hours by dividing by 60.

\text{Time in hours} = \frac{\text{Time in minutes}}{60} = \frac{2800}{60} = 46.67 \text{ hours}

Therefore, it will take Pat approximately 46.67 hours to knit a scarf that is 160 cm long.

Conclusion

Introduction

In our previous article, we explored Pat's knitting rate and calculated how long it would take her to knit a scarf that is 160 cm long. In this article, we will answer some frequently asked questions about Pat's knitting rate and provide additional insights into her knitting abilities.

Q: What is Pat's knitting rate in minutes per centimeter?

A: Pat's knitting rate in minutes per centimeter is 17.5 minutes/cm. This means that she can knit 2 cm in 35 minutes.

Q: How long will it take Pat to knit a scarf that is 180 cm long?

A: To calculate the time it will take Pat to knit a scarf that is 180 cm long, we can use the rate in minutes per centimeter. We can multiply the length of the scarf in centimeters by the rate in minutes per centimeter to get the total time in minutes.

\text{Time in minutes} = \text{Length in cm} \times \text{Rate in min/cm} = 180 \times 17.5 = 3150 \text{ minutes}

Since there are 60 minutes in an hour, we can convert the time from minutes to hours by dividing by 60.

\text{Time in hours} = \frac{\text{Time in minutes}}{60} = \frac{3150}{60} = 52.5 \text{ hours}

Therefore, it will take Pat approximately 52.5 hours to knit a scarf that is 180 cm long.

Q: What is Pat's knitting rate in millimeters per minute?

A: Pat's knitting rate in millimeters per minute is 0.5714 mm/min. This means that she can knit 20 mm in 35 minutes.

Q: How long will it take Pat to knit a scarf that is 200 cm long?

A: To calculate the time it will take Pat to knit a scarf that is 200 cm long, we can use the rate in millimeters per minute. We can multiply the length of the scarf in millimeters by the rate in millimeters per minute to get the total time in minutes.

\text{Length in mm} = \text{Length in cm} \times 10 = 200 \times 10 = 2000 \text{ mm}

Now, we can divide the length in millimeters by the rate in millimeters per minute to get the total time in minutes.

\text{Time in minutes} = \frac{\text{Length in mm}}{\text{Rate in mm/min}} = \frac{2000}{0.5714} = 3495.45 \text{ minutes}

Since there are 60 minutes in an hour, we can convert the time from minutes to hours by dividing by 60.

\text{Time in hours} = \frac{\text{Time in minutes}}{60} = \frac{3495.45}{60} = 58.25 \text{ hours}

Therefore, it will take Pat approximately 58.25 hours to knit a scarf that is 200 cm long.

Q: Can Pat knit faster or slower than her current rate?

A: Yes, Pat can knit faster or slower than her current rate. Her current rate is 17.5 minutes/cm, but she can adjust her speed to suit her needs. If she wants to knit faster, she can increase her speed, but if she wants to knit slower, she can decrease her speed.

Conclusion

In this article, we answered some frequently asked questions about Pat's knitting rate and provided additional insights into her knitting abilities. We calculated the time it will take Pat to knit scarves of different lengths and discussed how she can adjust her speed to suit her needs. Whether you're a seasoned knitter or just starting out, understanding Pat's knitting rate can help you plan your projects and achieve your goals.