27
Q:

The question given below contain two statements giving certain data. You have to decide whether the data given in the statements are sufficient for answering the question ?

Question :

What is the height of a right-angled triangle ?

Statements :

A. The area of the triangle is 20 times its base.

B. The perimeter of the triangle is equal to that of a square of the side 10 cm.

A) Only statement A is required B) Only statement B is required
C) Both A & B are required D) Neither (A) nor (B) is reuired

Answer:   A) Only statement A is required



Explanation:

From statement (A),

20b = (1/2) × b × h

h = 40 cm.

Q:

If the length of a chord of a circle is 16 cm and is at a distance of 15 cm from the centre of the circle, then the radius of the circle (in cm) is

A) 15 B) 16
C) 17 D) 34
 
Answer & Explanation Answer: C) 17

Explanation:
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1 76
Q:

In a triangle PQR, PQ = PR and angle Q is twice that of angle P. Then angle Q is equal to

A) 72 deg B) 36 deg
C) 144 deg D) 108 deg
 
Answer & Explanation Answer: A) 72 deg

Explanation:
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1 68
Q:

If two circles touch each other internally. The greater circle has its radius as 6 cm and the distance between the centres of the circles is 2 cm. The radius of the other circle is

A) 3 cm B) 4 cm
C) 2 cm D) 5 cm
 
Answer & Explanation Answer: B) 4 cm

Explanation:
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0 80
Q:

The area of a field in the shape of a regular hexagon is 2400√3 sq.m. The cost of fencing the field at Rs. 16.80/metre is:

 

A) 4,536   B) 3,024  
C) 4,032   D) 3,528  
 
Answer & Explanation Answer: C) 4,032  

Explanation:
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0 295
Q:

Two circles of radii 7 cm and 5 cm intersect each other at A and B, and the distance between their centres is 10 cm. The length (incm) of the common chord AB is:

 

A) 3√66/5 B) 4√66/5
C) 2√74/5 D) 3√74/5
 
Answer & Explanation Answer: B) 4√66/5

Explanation:
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2 220
Q:

The chords AB and CD ofa circle intersect at E. IfAE = 12 cm, BE = 20.25 cm and CE = 3 DE,thenthe length (in cm) of CE is:

.

A) 27 B) 25.5
C) 18 D) 28.5
 
Answer & Explanation Answer: A) 27

Explanation:
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1 145
Q:

The length and breadth of a rectangular field is in the of ratio 3:2. If the area of the field is 1350 sq.m, then the cost of fencing it at ₹30/m will be:

 

A) ₹ 5,680 B) ₹ 4,500
C) ₹ 4,000 D) ₹ 5,240
 
Answer & Explanation Answer: B) ₹ 4,500

Explanation:
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0 334
Q:

The diagonal of a square A is (a + b) units. What is the area (in square units) of the square drawn on the diagonal of square B whose area is twice the area of A?

 

A) (a + b)^2 B) 4(a + b)^2
C) 8(a + b)^2 D) 2(a + b)^2
 
Answer & Explanation Answer: D) 2(a + b)^2

Explanation:
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0 239