11.

A has 20% more money than B and C has 20% less money than B. What percent more money does A have than C?

• 30

• 50

• 17

• 43

Rani, who is y yr old at present, is x yr older than Hamid. 15 yr ago, Hamid's age was $\frac{1}{4}$ of the age of Rani. Which of the following is true?

• 3y-4x= 45

• 2y-x= 15

• $\frac{\mathrm{y}}{\mathrm{x}}$-15= $\frac{1}{4}$

• 3x-4y= 45

Cost price of 20 articles is equal to selling price of x articles. If the profit is 25%, then the value of x is

• 15

• 16

• 18

• 25

The value of a machine depreciates at the rate of 10% per year. It was purchased 3 yr ago. If its present value is $₹$145800 for how much was it purchased?

• $₹$175800

• $₹$180000

• $₹$200000

• $₹$210000

The base of an isosceles ABC is 48 cm and its area is 168 cm. The length of one of its equal sides is

• 8 cm

• 15cm

• 17cm

• 25 cm

The area of a square is$\frac{16}{\mathrm{\pi }}$ of the area of a circle. The ratio of the side of the square to the diameter of the circle is

• 3:1

• 2:1

• n:1

• $\sqrt{2}\mathrm{\pi }$:1

The sum of all interior angles of a polygon is 1440°. The number of sides of the polygon is

• 8

• 10

• 9

• 12

If a, b and c are respectively the number of faces, edges, and vertices of a pentagonal pyramid, then the value of ${\left(\frac{\mathrm{a}-\mathrm{b}+\mathrm{c}}{2}\right)}^2-2$ is 

• -1.5

• 2

• 1.75

• -1

If one angle of a triangle is 130°, then the angle between the bisectors of the other two angles is

• 65°

• 115°

• 130°

• 155°

Four times the area of the curved surface of a cylinder is equal to 6 times the sum of the areas of its bases. If its height is 12 cm, then its volume (in cm³) is

• 48$\mathrm{\pi }$

• $384\mathrm{\pi }$

• 546$\mathrm{\pi }$

• 768$\mathrm{\pi }$