CAT 2021 Question Paper | CAT Verbal Ability Slot 3
Question :
The cost of fencing a rectangular plot is ₹ 200 per ft along one side, and ₹ 100 per ft along the three other sides. If the area of the rectangular plot is 60000 sq. ft, then the lowest possible cost of fencing all four sides, in INR, is
Started 2 weeks ago by Shashank in
Option D
is the correct answer.
Explanatory Answer
Let the length be x and the breadth be y,
Then the area of the region will be
x×y = 60000
Then the cost of fencing the region will be
200x + 100x + 100y + 100y
300x + 200y
Now we know that the Arithmetic mean ≥ Geometric mean.
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