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Common Core: 4th Grade Math : Solving for Length

Study concepts, example questions & explanations for Common Core: 4th Grade Math

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All Common Core: 4th Grade Math Resources

7 Diagnostic Tests 189 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #41 : Apply Area And Perimeter Formulas For Rectangles: Ccss.Math.Content.4.Md.A.3

What is the length of a rectangular room with an area of 84ft^2 and a width of 12ft?

Possible Answers:

11ft

7ft

8ft

9ft

10ft

Correct answer:

7ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$84=l\times 12$

$\frac{84}{12}=\frac{l\times 12}{12}$

7=l

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Example Question #343 : Geometry

What is the length of a rectangular room with an area of 90ft^2 and a width of 15ft?

Possible Answers:

8ft

7ft

9ft

6ft

5ft

Correct answer:

6ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$90=l\times 15$

$\frac{90}{15}=\frac{l\times 15}{15}$

6=l

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Example Question #41 : Apply Area And Perimeter Formulas For Rectangles: Ccss.Math.Content.4.Md.A.3

What is the length of a rectangular room with an area of 96ft^2 and a width of 8ft?

Possible Answers:

11ft

12ft

10ft

14ft

13ft

Correct answer:

12ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$96=l\times 8$

$\frac{96}{8}=\frac{l\times 8}{8}$

12=l

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Example Question #41 : Solving For Length

What is the length of a rectangular room with an area of 20ft^2 and a width of 4ft?

Possible Answers:

6ft

2ft

5ft

4ft

3ft

Correct answer:

5ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$20=l\times 4$

$\frac{20}{4}=\frac{l\times 4}{4}$

5=l

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Example Question #42 : Apply Area And Perimeter Formulas For Rectangles: Ccss.Math.Content.4.Md.A.3

What is the length of a rectangular room with an area of 48ft^2 and a width of 4ft?

Possible Answers:

10ft

9ft

8ft

11ft

12ft

Correct answer:

12ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$48=l\times 4$

$\frac{48}{4}=\frac{l\times 4}{4}$

12=l

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Example Question #103 : Parallelograms

What is the length of a rectangular room with an area of 50ft^2 and a width of 5ft?

Possible Answers:

8ft

11ft

9ft

12ft

10ft

Correct answer:

10ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$50=l\times 5$

$\frac{50}{5}=\frac{l\times 5}{5}$

10=l

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Example Question #161 : How To Find The Area Of A Rectangle

What is the length of a rectangular room with an area of 80ft^2 and a width of 10ft?

Possible Answers:

8ft

10ft

11ft

7ft

9ft

Correct answer:

8ft

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$80=l\times 10$

$\frac{80}{10}=\frac{l\times 10}{10}$

8=l

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Example Question #1351 : Common Core Math: Grade 4

What is the length of a rectangular yard with an area of 8m^2 and a width of 4m?

Possible Answers:

Correct answer:

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$8=l\times 4$

$\frac{8}{4}=\frac{l\times 4}{4}$

2=l

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Example Question #1351 : Common Core Math: Grade 4

What is the length of a rectangular yard with an area of 12m^2 and a width of 4m?

Possible Answers:

Correct answer:

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$12=l\times 4$

$\frac{12}{4}=\frac{l\times 4}{4}$

3=l

Report an Error

Example Question #1352 : Common Core Math: Grade 4

What is the length of a rectangular yard with an area of 15m^2 and a width of 3m?

Possible Answers:

Correct answer:

Explanation:

$A=l\times w$

We have the area and the width, so we can plug those values into our equation and solve for our unknown.

$15=l\times 3$

$\frac{15}{3}=\frac{l\times 3}{3}$

5=l

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All Common Core: 4th Grade Math Resources

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Common Core: 4th Grade Math : Solving for Length

Study concepts, example questions & explanations for Common Core: 4th Grade Math

All Common Core: 4th Grade Math Resources

Example Questions

Example Question #41 : Apply Area And Perimeter Formulas For Rectangles: Ccss.Math.Content.4.Md.A.3

Example Question #343 : Geometry

Example Question #41 : Apply Area And Perimeter Formulas For Rectangles: Ccss.Math.Content.4.Md.A.3

Example Question #41 : Solving For Length

Example Question #42 : Apply Area And Perimeter Formulas For Rectangles: Ccss.Math.Content.4.Md.A.3

Example Question #103 : Parallelograms

Example Question #161 : How To Find The Area Of A Rectangle

Example Question #1351 : Common Core Math: Grade 4

Example Question #1351 : Common Core Math: Grade 4

Example Question #1352 : Common Core Math: Grade 4

All Common Core: 4th Grade Math Resources

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