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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 #209 : Geometry

What is the length of a rectangular room with an area of 40ft^2 and a width of 8ft?

Possible Answers:

6ft

5ft

7ft

3ft

4ft

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.

$40=l\times 8$

$\frac{40}{8}=\frac{l\times 8}{8}$

5=l

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Example Question #174 : Geometry

What is the length of a rectangular room with an area of 110ft^2 and a width of 11ft?

Possible Answers:

11ft

9ft

7ft

10ft

8ft

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.

$110=l\times 11$

$\frac{110}{11}=\frac{l\times 11}{11}$

10=l

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Example Question #171 : Geometry

What is the length of a rectangular room with an area of 100ft^2 and a width of 25ft?

Possible Answers:

7ft

4ft

8ft

5ft

6ft

Correct answer:

4ft

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.

$100=l\times 25$

$\frac{100}{25}=\frac{l\times 25}{25}$

4=l

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Example Question #175 : Geometry

What is the length of a rectangular room with an area of 60ft^2 and a width of 6ft?

Possible Answers:

8ft

9ft

7ft

6ft

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.

$60=l\times 6$

$\frac{60}{6}=\frac{l\times 6}{6}$

10=l

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Example Question #143 : Rectangles

What is the length of a rectangular room with an area of 52ft^2 and a width of 4ft?

Possible Answers:

11ft

13ft

14ft

15ft

12ft

Correct answer:

13ft

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.

$52=l\times 4$

$\frac{52}{4}=\frac{l\times 4}{4}$

13=l

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Example Question #151 : Rectangles

What is the length of a rectangular room with an area of 63ft^2 and a width of 9ft?

Possible Answers:

8ft

11ft

7ft

10ft

9ft

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.

$63=l\times 9$

$\frac{63}{9}=\frac{l\times 9}{9}$

7=l

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Example Question #171 : Quadrilaterals

What is the length of a rectangular room with an area of 77ft^2 and a width of 11ft?

Possible Answers:

9ft

8ft

7ft

6ft

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.

$77=l\times 11$

$\frac{77}{11}=\frac{l\times 11}{11}$

7=l

Report an Error

Example Question #181 : Geometry

What is the length of a rectangular room with an area of 132ft^2 and a width of 11ft?

Possible Answers:

13ft

14ft

10ft

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.

$132=l\times 11$

$\frac{132}{11}=\frac{l\times 11}{11}$

12=l

Report an Error

Example Question #333 : Geometry

What is the length of a rectangular room with an area of 64ft^2 and a width of 8ft?

Possible Answers:

6ft

7ft

8ft

5ft

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.

$64=l\times 8$

$\frac{64}{8}=\frac{l\times 8}{8}$

8=l

Report an Error

Example Question #101 : Quadrilaterals

What is the length of a rectangular room with an area of 65ft^2 and a width of 5ft?

Possible Answers:

13ft

12ft

9ft

11ft

10ft

Correct answer:

13ft

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.

$65=l\times 5$

$\frac{65}{5}=\frac{l\times 5}{5}$

13=l

Report an Error

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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 #209 : Geometry

Example Question #174 : Geometry

Example Question #171 : Geometry

Example Question #175 : Geometry

Example Question #143 : Rectangles

Example Question #151 : Rectangles

Example Question #171 : Quadrilaterals

Example Question #181 : Geometry

Example Question #333 : Geometry

Example Question #101 : Quadrilaterals

All Common Core: 4th Grade Math Resources

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