Question

Q21. If m and n are the zeros of the polynomial 4x2 + 10x – 6 then (1/m) + (1/n) is equal to

a) 5/3 b) -5/3 c) 3/5 d) -3/5




Q22. The values of k for which the roots are real and equal k2x

2 – 2(2k – 1)x + 4 = 0 is

a) ¼ b) 4 c) -4 d) -1/4




Q23. If the nth term of an AP is (2n + 1), then the sum of first n terms of the AP is

a) n(n + 2) b) 2n c) n(n + 3) d) n + 1




Q24. In a Δ ABC, right angled at A, if tan C = 1, then the value of Sin B Cos C + Cos B Sin C is

a) -1 b) 1 c) 2 d) 3




Q25. A bicycle wheel makes 10000 revolutions in moving 11 km, then the diameter of the wheel

is

a) 17.5 cm b) 35 cm c) 25 cm d) 70 cm



Q26. A hemispherical bowl of internal diameter 30 cm contains a liquid. This liquid is to be

filled in cylindrical bottles of radius 3 cm and height 5 cm, then how many bottles are required to

empty the bowl is

a) 30 b) 40 c) 50 d) 60



Q27. If sum of the squares of zeros of the quadratic polynomial x2 – 9x + k is 41 then the value

of k is

a) 18 b) 19 c) 20 d) 21




Q28. If -5 is a root of the quadratic equation is 2x2 + px -15 = 0 and the quadratic equation px2 + a) 7/4 b) 5/4 c) 3/4 d) 1/4

(MCQ CLASS 10)​

Answer 1

Answer:

oh my god this much hard answer