11
Q:

# If a sum of money at simple interest doubles in 6 years, it will become  4 times in

 A) 15years B) 16years C) 17years D) 18years

Explanation:

let sum =x . s.i.=x

rate =(100*x)/(x*6)=50/3%

now ,sum =x, s.i= 3x, rate =50/3%

time =(100*3x)/(x*50/3) = 18 years

Q:

If , then what is the value of tan2θ?

 A) 2√3 B) √3 C) 1/√3 D) Cannot be determined

Explanation:

0 0
Q:

A square is inscribed in a quarter circle in such a way that two of its adjacent vertices on the radius are equidistant from the centre and other two vertices lie on the circumference. If the side of square is √(5/2) cm, then what is the radius (in cm) of the circle?

 A) 2 B) 2.5 C) 5 D) 10

Explanation:

0 0
Q:

How many diagonals are there in octagon?

 A) 12 B) 14 C) 20 D) 24

Explanation:

0 0
Q:

ABCD is a parallelogram in which AB = 7 cm, BC = 9 cm and AC = 8 cm. What is the length (in cm) of other diagonal?

 A) 14 B) 14√2 C) 7 D) 7√2

Explanation:

0 0
Q:

In the fig ∆ ABC is inscribed in a circle with centre O. If ∠ABC = 30° then ∠ACB is equal to

 A) 30° B) 60° C) 50° D) 90°

Explanation:

0 60
Q:

If

 A) 1 B) 2 C) 3 D) 4

Explanation:

1 53
Q:

If a > b > 0, AB = a - b cm, BC = 2√ab cm, then ∠ABC is

 A)  45° B)  60 C)  90° D)  120°

Explanation:

0 112
Q:

PR is a tangent to a circle with centre O and radius 4 cm at point Q. If ∠POR = 90°, OR = 5 cm and OP = 20/3 cm, then the length of PR is:

 A) 16/3 cm B) 23/3 cm C) 25/3 cm D) 3 cm

Answer & Explanation Answer: C) 25/3 cm

Explanation: