Maths questions series #4
Two circle X and Y with centres A and B intersect at C and D. If area of circle X is 4 time area of circle Y, then AB=?
(A) 5r
(B) $${\sqrt{5}r}$$
(C) 3r
(D) $$ {\sqrt{5}\over 2}r$$
Correct Answer : B
One of the diagonals of a rhombus is 70% of the other diagonal, what is the ratio of area of rhombus to the square of the length of the larger diagonal?
(A) 7:20
(B) 7:10
(C) 3:10
(D) 3:20
Correct Answer : A
In the given fig, find the value of x
(A) 135°
(B) 155°
(C) 145°
(D) 70°
Correct Answer : C
If a regular polygon has 5 sides then the measure of its interior angle is greater than the measure of its exterior angle by how many degrees?
(A) 60°
(B) 36°
(C) 90°
(D) 100°
Correct Answer : B
A tower is broken at a point P above the ground. The top of the tower makes an angle 60 ° with the ground at Q. From another point R on the opposite side of Q angle of elevation of point P is 30 °. If QR = 180 m, then what is the total height (in meters ) of the tower ?
(A) 45(√3+1)
(B) 45(√3+2)
(C) 90
(D) 45√3
Correct Answer : B
A person from the top of a hill observes a vehicle moving towards him at a uniform speed. It takes 10 minutes for the angle of depression to change from 45 ° to 60 °. After this the time required by the vehicle to reach the bottom of the hill is
(A) 13 min 40 sec
(B) 14 min 24 sec
(C) 12 min 20 sec
(D) 13 min
Correct Answer : A
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