TANCET 2008 Quant Question 5 : Circles - Mensuration

Question

If x units are added to the length of the radius of a circle, what is the number of units by which the circumference of the circle is increased?

1. x
2. 2
3. 
4. 
5. x²

Correct Answer: . Choice (4)

Explanatory Answers

Let the radius of the circle be 'r' units.
The circumference of the circle will therefore be units.

If the radius is increased by 'x' units, the new radius will be (r + x) units.

The new circumference will be
Or the circumference increases by units.

Correct Answer (4)

Level of difficulty : Very Easy

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