If x + y = 23 and xy = 126; then (x)2 + (y)2 = ?
(a) 250 (b) 317 (c) 340 (d) Cannot be determined (e) None of these
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Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 m s–1, calculate
Derivation of formula v = ν λ. (i) 340 = 256 λ λ = 1.33 m. (ii) 340 = ν (0.85) ...
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Parenchyma cells are (a) relatively unspecified and thin walled (b) thick walled and specialised (c) lignified (c) none of these
(a) relatively unspecified and thin walled
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Why Λmº for CH3 COOH cannot be determined experimentally ?
Molar conductivity of weak electrolytes keeps on increasing with dilution and does not become constant even at very large dilution
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11.88 x 250/18=? (a) 16.50 (b) 4131 (c) 30250 (d) 20350 (e) None of these
(e) ? = 11.88 × 250/18 =165
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If 2x + 3y = 78 and 3x + 2y = 72, what is the value of x + y ? (a) 36 (b) 32 (c) 30 (d) Cannot be determined (e) None of these
(c) 2x + 3y = 78 ... (i) 3x + 2y = 72 ...(ii) From equations (i) and (ii), x = 12, y = 18 x + y = 12 + 18 = 30
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If x + y =18 and xy = 72, what is the value of (x)^2 + (y)^2 ? (a) 120 (b) 90 (c) 180 (d) Cannot be determined (e) None of these
(c) x + y = 18 (x + y)2 = 182 = 324 x2 + y2 + 2xy = 324 x2 + y2 = 324 – 2xy x2 + y2 = 324 – 2(72) x2...
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12.36 × 18.15 + 21.52 = ? (a) 250.3036 (b) 209.1448 (c) 249.454 (d) 245.854 (e) None of these
(d) ? = 12.36 × 18.15 + 21.52 = 224.334 + 21.52 = 245.854
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If x + y = 20 and xy = 84, then (x)^2 + (y)^2 = ? (a) 232 (b) 400 (c) 128 (d) Cannot be determined (e) None of these
(a) Given, x + y = 20 and xy = 84 x2 + y2 = (x + y)2 – 2xy = (20)2 – 2 × 84 = 400 – 168 = 232
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If the length and breadth of a rectangle are doubled then its perimeter is (1) tripled (2) doubled (3) made half (4) None of these
(2) Let the initial length and breadth be l and b, respectively. So, the initial perimeter = 2 (l + b) The final perimeter = 2 (2l + 2b) =...
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Which is Krishnan's hometown? (a) Ahmedabad (b) Cuttack (c) Bhopal (d) Cannot be determined.
(c) Bhopal The given information can be tabulated as follows : Name Home town College in home town Studying Studying Subject Gopal Ernakulam Engineering Bhopal/Ahm. Harsh Delhi Com. / Med Cuttack Inder Cuttack Com. / Med Bhopal/Ahm. Jai Ahmedabad History Ernakulam Engineering Krishnan Bhopal Economics Delhi ...
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