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प्र: What has 4 Eyes But cannot see? 1718 0

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उत्तर :
व्याख्या :

What has 4 Eyes But cannot see is Mississippi. The wording of Mississippi has 4 'i''s. But it can't see.

प्र: Two parallel chords on the same side of the centre of a circle are 5 cm apart. If the chords are 20 and 28 cm long, what is the radius of the circle? 1718 0

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    14.69 cm
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    15.69 cm
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    18.65 cm
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    16.42 cm
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उत्तर : 2. "15.69 cm"
व्याख्या :

Answer: B) 15.69 cm Explanation: Draw the two chords as shown in the figure. Let O be the center of the circle. Draw OC perpendicular to both chords. That divides the two chords in half.So CD = 10 and AB = 14. Draw radii OA and OD, both equal to radius r.We are given that BC = 5, the distance between the two chords. LetOB = x. We use the Pythagorean theorem on right triangle ABO AO² = AB² + OB² r² = 14² + x² We use the Pythagorean theorem on right triangle DCO DO² = CD² + OC² We see that OC = OB+BC = x+5, so r² = 10² + (x+5)² So we have a system of two equations: r² = 14² + x² r² = 10² + (x+5)² Since both left sides equal r², set the right sidesequal to each other. 14² + x² = 10² + (x+5)² 196 + x² = 100 + x² + 10x + 25 196 = 125 + 10x 71 = 10x 7.1 = x r² = 14² + x² r² = 196 + (7.1)² r² = 196 + 50.41 r² = 246.41 r = √246.41 r = 15.69745202 cm

प्र: National Statistics day observed every year on 1718 0

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    20 October
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    20 July
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    29 June
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    21 September
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उत्तर : 3. "29 June"
व्याख्या :

Answer: C) 29 June Explanation: National Statistics day is celebrated annually 29th June, on the occasion of Birth anniversary of India’s eminent statistician Late Prof Prasanta Chandra Mahalanobis. It also commemorates the contributions made by PC Mahalanobis in the fields of statistics and economic planning.

प्र: The length of a rectangle is 10 cm more than the breadth. Find the diagonal length of rectangle if perimeter is 44 cm ? 1717 0

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    12.50 cm
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    14.21 cm
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    15.98 cm
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    17.08 cm
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उत्तर : 4. "17.08 cm"
व्याख्या :

Answer: D) 17.08 cm Explanation: Let the length of the rectangle = L cm   Then the breadth of the rectangle = (L - 10) cm   Perimeter of a rectangle = 2(L + B) cm   => 44 = 2(L + L - 10)   => 44 = 4L - 20   => 4L = 64   => L = 16 cm   => B = L - 10 = 6 cm   Diagonal = L2+B2 = 162+62 = 17.08 cm

प्र: Which naxal affected district police has been selected for the International Association of Chiefs of Police (IACP) award this year for its community policing initiative focusing on the rehabilitation of Naxals  ? 1717 0

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    Bastar Police, Chhattisgarh
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    Lucknow Police, UP
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    Patna Police , Bihar
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    Jaipur Police, Rajasthan
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उत्तर : 1. "Bastar Police, Chhattisgarh"
व्याख्या :

Answer: A) Bastar Police, Chhattisgarh Explanation:

प्र: In a plane 8 points are colliner  out of 12 points, then the number of triangles we get with those 12 points is 1716 0

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    20
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    160
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    164
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    220
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उत्तर : 3. "164"
व्याख्या :

Answer: C) 164 Explanation: For a triangle, we need 3 non-collinear points. So with 12 points (when all the 12 are such that any three non-collinear is12C3. But among them 8 points are collinear.   If all these 8 points are different we get 8C3 triangles as they are collinear.   In 12C3 triangles, we do not get 8C3 triangles   Therefore, The number of triangles we get = 12C3-8C3 = 164

प्र: Praveena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 432 as interest at the end of the loan period, what was the rate of interest ? 1716 0

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    6
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    7
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    9
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    11
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उत्तर : 1. "6"
व्याख्या :

Answer: A) 6 Explanation: Let rate = R% and time = R years.   Then, (1200 x R x R) / 100 = 432   => R = 6.

प्र: A low trough is indicative of 1715 0

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    the start of a depression
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    the end of a recession
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    a serious depression
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    a growing recession
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उत्तर : 4. "a growing recession"
व्याख्या :

Answer: D) a growing recession Explanation: A low trough is indicative of "a growing recession" since a trough indicates a general change in the business cycle, which can have varying degrees of importance. A recession could be an important decline in economic activity that goes on for quite many months.

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