If the area of a circle is A, radius of the circle is r and circumference of it is C, then

• rC = 2A

• 

• 

• 

Two poles of height 7 m and 12 m stand on a plane ground. If the distance between their feet is 12 m, the distance between their top will be

• 13 m

• 19 m

• 15 m

• 17 m

 2x - ky + 7 = 0 and  6x - 12y + 15 = 0 has no solution for

• k = 1

• k = -1

• k = 4

• k = -4

114.

Two chords of length a unit and b unit of a circle make angles 60° and 90° at the centre of a circle respectively, then the correct relation is

• 

• 

• 

• 

The market price of a watch was ₹ 720. A man bought the same for ₹ 550.80 after getting two successive discounts, the first being 10%. The second discount rate is

• 12%

• 14%

• 15%

• 18%

Allowing 20% and 15% successive discounts, the selling price of an article become ₹ 3060, then the marked price will be

• ₹ 5000

• ₹ 4400

• ₹ 4500

• ₹ 4000

If  then the simplest value of x is

• 1

• -1

• -2

• 2

If m = -4,  n = -2, then the value of 
m³ - 3m² + 3m + 3n + 3n² + n³

• -126

• 124

• 126

• -124

The measure of an angle whose supplement is three times as large as its complement, is

• 60°

• 75°

• 30°

• 45°

If sin θ + sin ² θ = 1, then cos² θ + cos⁴ θ is equal to

• 1

• 

• 

• None