CAT 2017 Question Paper | Quants Slot 1

CAT Previous Year Paper | CAT Coordinate Geometry Questions | Question 15

Have you ever tried to find the location of a fly sitting on your wall? Rene Descartes, the person who gave birth to the concept of co-ordinate geometry, did once. Try this problem from co-ordinate geometry which appeared in CAT 2017 question paper. It might help you to connect the dots properly! To find more fun questions from Geometry head out here.

Question 15 : The area of the closed region bounded by the equation | x | + | y | = 2 in the two-dimensional plane is

1. 4
2. 8

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Method of solving this CAT Question from Coordinate Geometry

The area of the closed region bounded is given by the equation,
| x | + | y | = 2.
We can substitute x = 0 or y = 0.
The coordinates we obtain are as follows;
(2,2) , (-2,2) , (2,-2) and (-2,-2)
On joining these points you will get a square whose diagonal is 4 units. Therefore, the sides of the square will be 2√(2) and its area will be 2√(2) × 2√(2) = 8
The area of the closed region is 8 sq. units.

The question is "The area of the closed region bounded by the equation | x | + | y | = 2 in the two-dimensional plane is"

Hence, the answer is 8 sq. units

Choice C is the correct answer.

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