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A hall measures 18 feet long and 10 feet wide. If the width of the hall is doubled, what would be the area of the new hall?

34 square feet
134 square feet
104 square feet
360 square feet
Explanation:

If the width of the hall is doubled, then the new width = 2 × 10 feet = 20 feet

Area of the new hall = 18 feet × 20 feet = 360 square feet.

[Area of a rectangle = height × width.]

So, the new area of the hall is 360 square feet.

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