A chord of length 39 cm is at a distance of 10.4 cm from the centre of a circle. Find the radius of the circle.

• 19.5 cm (appr)

• 22.1 cm (appr)

• 28.6 cm (appr)

• 28.6 cm (appr)

The value of  is

• 1

• -1

• 
• 

The largest number of four digits exactly divisible by 88 is

• 9988

• 9944

• 8888

• 8888

The average age of the boys in a class is 18 years. The average age of the girls in that class is 12 years. If the ratio of the number of boys and girls in that class is 3 : 2, then the average age of the class is

• 15.6 years

• 16.5 years

• 15 years

• 15 years

If 6x² - 12x + 1 = 0, then the value of  is

• 162

• 189

• 207

• 207

66.

If  , then the value of  is

• 9

• -9

• 1

• 1

I is the incentre of Δ ABC and if ∠BAC = 70°, then ∠BIC is

• 140°

• 55°

• 125°

• 35°

A chord of length 10 cm subtends an angle 120° at the centre of the circle. Distance of the chord from the centre is

•  

  

•  

  

•  

  

•  

  5

If   then the value of  is:

If the length and breadth of a rectangle are increased by 10% and 8% respectively, then the area of the rectangle increases by

• 
• 

• 18%

• 18%