Maths Class 10

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Maths Class X (CBSE)
You are on Set no 1 Qno. 1 to 20
Time allowed : 3 hours
Maximum Marks : 100
General Instructions :
(i) Question number 1 to 15 carry 2 marks each.
(ii) Question number 16 to 25 carry 4 marks each.
(iii) Question number 26 to 30 carry 6 marks each.
(iv) Write the serial number of the question before attempting it. (v) Use of logarithmic and trignometric tables is permitted. Use of calculator is not permitted. ________________________________________

Section - A
Q1) Find the value of k for which the system of equations has no solution : 3x - 4y + 7 = 0
kx + 3y - 5 = 0 (Marks 2) =1.25
Answer
Q2) Find the g.c.d. of the following polynomials :
2x2 - x - 1 and 4x2 + 8x + 3 (Marks 2) =
Answer
Q3) If A = (x + 1)/(x - 1), find A - 1/A in the simplified form. (Marks 2) Answer
Q4) Form the quadratic equation in x whose roots are 2 + 5 and 2 - 5. (Marks 2) Answer
Q5) The base radii of two right circular cones of the same height are in the ratio 3 : 5. Find the ratio of their volumes. (Marks 2) Answer
Q6) A colour T.V. is available for Rs. 13,440 inclusive of sales tax. If the original cost of T.V. is Rs. 12,000 find the rate of sales tax. (Marks 2) Answer
Q7) Evaluate : cot 54o/tan 36o + tan 20o/cot 70o - 2 (Marks 2) Answer
Q8) Simplify : (1 + tan2 )(1 - sin )(1 + sin ) (Marks 2)
Answer
Q9) Prove that : sin /(1 - cos ) = cosec + cot . (Marks 2) Answer
Q10) In Fig. 1, ABC and DEF are similar. The area of ABC is 9 sq.cm and area of DEF is 16 sq.cm. If BC = 2.1 cm, find the length of EF. (Marks 2)
Answer
Q11) In Fig. 2, O is the centre of the circle and AB is a chord of the circle. Line QBS is a tangent to the circle at B. If AOB = 110o, find APB and ABQ. (Marks 2)
Answer
Q12) In Fig. 3, chords AB and CD intersect at P. If AB = 5 cm, PB = 3 cm and PD = 4 cm, find the length of CD. (Marks 2)
Answer
Q13) Calculate the median of the following data :
83, 37, 70, 29, 45, 63, 41, 70, 30, 54 (Marks 2)
Q14) Find the Crude Death Rate (CDR) for the following data: (Marks 2) Age group
(in years)PopulationNumber
of Deaths
0 - 105000250
10 - 252000120
25 - 458000150
45 - 70700080
Above 703000250
Answer
Q15) Flow Chart. Omitted being out of Syllabus. (Marks 2)
Section - B

Answer
Q16) Solve for the following system of equations graphically : 2x + y - 3 = 0
2x - 3y - 7 = 0 (Marks 4)
Answer
Q17) Factorise. Omitted, being out of Syllabus. (Marks 4)
Answer
Q18) A man has only 20 paise coins and 25 paise coins in his purse. If he has 50 coins in all totaling Rs. 11.25, how many coins of each does he have? (Marks 4) Answer
Q19) Divide 29 into two parts so that the sum of the squares of the parts is 425. (Marks 4) Answer
Q20) The diameter of a sphere is 42 cm. It is melted and drawn into a cylindrical wire of 28 cm diameter. Find the length of the wire. (Marks 4) Answer
Q21) “In a triangle, a line drawn parallel to one side, to intersect the other side in distinct points, divides the two sides in the same ratio". Prove. (Marks 4) Answer
Q22) The perpendicular AD on the base BC of a ABC intersects BC at D so that DB = 3CD. Prove that 2AB2 = 2AC2 + BC2 (Marks 4)
Answer
Q23) Find the mean of the following data : (Marks 4)
Class IntervalFrequency
0 - 108
10 - 2010
20 - 309
30 - 4012
40 - 5011
Answer
Q24) Algorithm. Omitted, being out of Syllabus. (Marks 4)
Answer
Q25) Flow Chart. Omitted, being out of Syllabus. (Marks 4)
Section - C

Answer
Q26) Solve for x :
4(x2 + 1/x2) + 8(x - 1/x) - 29 = 0 (Marks 6)
Answer
Q27) A tower in a city is 150 m high and a multistoried hotel at the city centre is 20 m high. The angle of elevation of the top of the tower at the top of the hotel is 5o. A building, h metres high, is situated on the straight road connecting the tower with the city centre at a distance of 1.2 km from the tower. Find the value of h if the top of the hotel, the top of the building and the top of the tower are in a...
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