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Meena has a ball of string 7 yards long. She need 30 feet string for a project. What should Meena do first to find out the length of string she requires? (1 yard =3 feet)
  • a)
    Multiply 30 by 7
  • b)
    Divide 30 by 7
  • c)
    Multiply 30 by 3
  • d)
    Multiply 7 by 3
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Meena has a ball of string 7 yards long. She need 30 feet string for a...
To find out the length of string Meena requires for her project, she needs to convert the measurements from yards to feet since she has the length of string in yards but needs the length in feet.

1 yard is equal to 3 feet, so Meena needs to multiply the length of string in yards by 3 to convert it into feet.

Let's break down the steps to find the length of string Meena requires:

1. Conversion factor: Since 1 yard is equal to 3 feet, we need to use this conversion factor to convert the length of string from yards to feet.

2. Multiply: Meena has a ball of string 7 yards long, so she needs to multiply the length of the string in yards (7) by the conversion factor (3) to get the length of string in feet.

Calculation: 7 yards * 3 feet/yard = 21 feet

3. Result: After multiplying, we find that Meena requires a string of length 21 feet for her project.

Therefore, the correct option is D) Multiply 7 by 3.

Explanation:
- The conversion factor is the key to converting the units from yards to feet.
- Meena multiplies the length in yards by the conversion factor to get the length in feet.
- The result gives Meena the length of string she requires for her project.
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Community Answer
Meena has a ball of string 7 yards long. She need 30 feet string for a...
Meena has 7 yards of string.
First, she should convert yards to feet. 1 yard = 3 feet as given
So, 7 yards = 7*3 feet
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Meena has a ball of string 7 yards long. She need 30 feet string for a project. What should Meena do first to find out the length of string she requires? (1 yard =3 feet)a)Multiply 30 by 7b)Divide 30 by 7c)Multiply 30 by 3d)Multiply 7 by 3Correct answer is option 'D'. Can you explain this answer?
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