This download link is referred from the post: SGBAU B.Tech Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university
4CT 01
Engineering Mathematics - II
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Pages: 3 AW -3075
Time : Three Hours Max. Marks : 80
Notes :
- All questions carry marks as indicated.
- Answer three questions from Section A and three questions from Section B.
- Due credit will be given to neatness and adequate dimensions.
- Assume suitable data wherever necessary.
- Illustrate your answer necessary with the help of neat sketches.
- Use of slide rule logarithmic tables, Steam tables, Mollier's Chart, Drawing instrument, Thermodynamic table for moist air, Psychrometric Charts and Refrigeration charts is permitted.
- Use of pen Blue/Black ink/refill only for writing the answer book.
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- a) A tightly stretched string of length £ with fixed ends is initially in equilibrium position. It is set vibrating by giving each point a velocity v sin (πx/l). Find the displacement y(x, t).
- b) Using the method of separation of variables, solve ∂u/∂x = 2∂u/∂t + u where u(x, 0) = 6e-3x
OR
- Solve the equation ∂2u/∂t2 = 4∂2u/∂x2 with boundary conditions u(x, 0) =3sinπx, u(0, t)=0 and u(l, t)=0 where 0 <x<1,&t>0.
- Find the deflection of a vibrating string of unit length having fixed ends with initial velocity zero and initial deflection f(x) = k(sinx -sin2x).
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- a) If f(z) is an analytic function with constant modulus, show that f(z) is constant.
- b) If (a+ib)x+iy =mc+id, prove that one of the values of y/x is 2tan-1(b/a)/log(a2 +b2)
- c) Find the analytic function, whose real part is sin2x/(cosh 2y —cos2x).
OR
- Find the conjugate harmonic of v(r,θ) = r2 cos2θ-rcosθ+2 and show that v is harmonic.
- Prove that tanh-1 x =sinh-1 [ x / √(1 - x2) ]
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- Find the orthogonal trajectories of the curves. x2+ y2 —6x+7y2 = constant
- a) Find the positive root of x4 - x -10 =0 correct to three decimal places, using Newton-Raphson method.
- b) From the following table the number of students who obtained marks between 40-45.
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Marks | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 |
---|---|---|---|---|---|
No. of students | 31 | 42 | 51 | 35 | 31 |
OR
- a) Solve the system of non-linear equations x2 + y=11, y2 +x =7 by Newton's - Raphson method.
- b) Use Simpson's 1/3rd rule to find ∫00.6 e-x2 dx by taking seven ordinates.
- a) Using simplex method, solve the LPP. Minimize : Z=x1-3x2+3x3; subject to 3x1 -x2+2x3<7 2x1 +4x2 ≥ -12 —4x1 +3x2 +8x3 <10 x1, x2, x3 ≥ 0
- b) Solve graphically the following L.LPP Maximize : Z=4x1+3x2; subject to x1 - x2 ≤ -1 —x1 + x2 ≤ 0 x1, x2 ≥ 0
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OR
- a) Using simplex method, solve following LPP Minimize : Z =3x1+5x2+4x3 subject to 2x1+3x2 ≤ 8 2x1+5x3 ≤ 10 3x1 +2x2 +4x3 ≤ 15 x1, x2, x3≥0
- b) Maximize : Z=2x1+3x2 Subject to x1-x2≤2 x1+x2≥4 x1,x2 >0
- Two cards are drawn in succession from a pack of 52 cards find the chance that the first is a king and the second is a queen, if the first card is i) replaced ii) not replaced
- A skilled typist on routine work kept a record of mistakes made per day during 300 working days.
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Mistake/day | 0 | 1 | 2 | 3 |
---|---|---|---|---|
No. of days | 143 | 90 | 42 | 12 |
OR
- A certain screw making machine produces on average of 2 defective screws out of 100 and packs them in boxes of 500 find the probability that a box contains 15 defective screws.
- If the variance of Poisson's distribution is 2. Find the probabilities for r = 1, 2, 3, 4, from the recurrence relation of the Poisson's distribution. Also find p(r=4).
- Fit a straight line to the data.
x | 1 | 2 | 3 | 4 | 5 |
---|---|---|---|---|---|
y | 5 | 7 | 9 | 10 | 11 |
- The regression equation of two variables x & y are x=0.7y+5.2 y=0.3x+2.8 find the mean of x & y
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OR
- The regression equation calculated from a given set of observation two random variables are x=-0.4y + 6.4 y=-0.6x+4.6 calculate X, y & r.
- Fit a straight line to the data.
X | 0 | 5 | 10 | 15 | 20 | 25 |
---|---|---|---|---|---|---|
y | 12 | 15 | 17 | 22 | 24 | 30 |
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This download link is referred from the post: SGBAU B.Tech Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university