Calculating Area and Seed Requirements

Ericka plans to plant grass in a field and needs to calculate how much seed to buy. She uses a map with a scale of 1 cm to 20 feet to determine the field's area. By converting the map's area from square centimeters to square feet, she finds that 180 square centimeters equals 72,000 square feet. Since one pound of seed covers 400 square feet, she calculates that she needs 180 pounds of seed to cover the entire field.

What is Erricka planning to do with the field?

• Build a house

• Plant grass

• Set up a playground

• Dig a pond

What is the first step in solving the problem?

• Estimate the seed cost

• Calculate the perimeter

• Find the area in square feet

• Determine the map scale

What is the area of the field in square centimeters?

• 150 square centimeters

• 200 square centimeters

• 160 square centimeters

• 180 square centimeters

What is the purpose of the map in this problem?

• To find the perimeter

• To determine the area

• To calculate the volume

• To measure the height

What does the map scale indicate?

• 1 centimeter equals 10 feet

• 1 centimeter equals 20 feet

• 1 centimeter equals 30 feet

• 1 centimeter equals 40 feet

Why is it necessary to convert linear measurements to square measurements?

• To measure the height

• To determine the volume

• To find the area

• To calculate the perimeter

What is the purpose of squaring the map scale?

• To measure the width

• To calculate the area

• To determine the height

• To find the volume

What is the first step in converting square centimeters to square feet?

• Multiply by 20

• Divide by 20

• Add 20 to the measurement

• Square the conversion factor

How do you convert 1 centimeter to square feet?

• Multiply by 20

• Multiply by 10

• Divide by 2

• Square it to get 400

What is the area of the field in square feet if the map shows 180 square centimeters?

• 72000 square feet

• 7200 square feet

• 36000 square feet

• 3600 square feet