A chord of length 16 cm is drawn in a circle of radius 10 cm. The distance of the chord from the centre of the circle is

• 8 cm

• 6 cm

• 4 cm

• 12 cm

An angle in a semicircle is 

63.

If  and , then  is equal to

• ab

• 
• 
• 

A can do a work in 12 days while B can do it in 15 days. They undertake to complete it together for ₹450/-. What will be the share of A in this amount of money?

• ₹ 200

• ₹ 240

• ₹ 250

• ₹ 250

If  then the value of  is

If  and  then the value of xy is

• -1

• 1

• -2

• -2

If in △ ABC, DE ∥ BC, AB = 7.5 cm, BD = 6 cm and DE = 2 cm then the length of BC in cm is

• 6

• 8

• 10

• 10

Suppose that the medians BD, CE and AF of a triangle ABC meet at G. Then AG : GF is

• 1: 2

• 2 : 1

• 1 : 3

• 1 : 3

If  then the value of   is

A sum of ₹ 2,000/- amounts to ₹ 4,000/- in two years at compound interest. In how many years does the same amount become ₹ 8,000/-?

• 2

• 4

• 6

• 6