Geometry and TrigonometryEasy–MediumArea of a rectangle when its width is tripled
Geometry and Trigonometry practice question
A rectangle is 2 metres wide and 7 metres long. If its width is tripled and its length is unchanged, what is the new area, in square metres?
Answer: 42
The new width is 6, and 6 × 7 = 42.
Common wrong answers
- If you answered 14
- 14 is the original area.
- If you answered 21
- 21 uses a width of 3.
- If you answered 126
- 126 triples both dimensions' product.
More Geometry and Trigonometry questions
- Easy–Medium
A circle has a radius of 6. What is its area? (Use A = πr².) - Easy–Medium
A right triangle has legs of length 6 and 8. What is the length of the hypotenuse? - Easy–Medium
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What is the midpoint of the segment joining the points (2, 3) and (8, 11)? - Easy–Medium
What is the measure, in degrees, of angle B? - Easy–Medium
What is the area, in square centimeters, of the trapezoid?
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