51. If a person walks at 14 km/hr speed instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is
(a) 50 km
(b) 56 km
(c) 70 km
(d) 80 km

52. If 3x + 2y = 12 and xy=6, then the value of 9x2+4y2 is
(a) 76
(b) 80
(c) 72
(d) 74

53.  An electric current of 250 mA flows in a conductor for 8 sec. What is the amount of charge transferred?
(a) 0.2 C
(b) 2 C
(c) 0.1 C
(d) 1 C

54.  Which gas turns lime water milky?
(a) Sulphur dioxide
(b) Nitrous oxide
(c) Carbon dioxide
(d) Ammonia

55. How may natural numbers divisible by 7 are there between 3 and 200?
(a) 27
(b) 28
(c) 29
(d) 26

56. In the given figure if QRS is an equilateral triangle and TQS is an isosceles triangle and X=47o then the value of Y (in degrees) will be(a) 13o
(b) 23o
(c) 33o
(d) 43o

57.Which one of the following planets has largest number of natural satellites?
(a) Jupiter
(b) Mars
(c) Saturn
(d) Venus

58. If it takes one minute to fill 3/7th of a vessel. What will be the time taken in minute to fill the whole vessel?
(a) 4/3
(b) 5/3
(c) 3/2
(d) 7/3

59. 1 Volt is equal to
(a) 1 joule
(b) 1 joule per coulomb
(c) 1 newton per coulomb
(d) 1 joule per newton

60. A rectangle has perimeter of 50 metres. If its mength is 13 metres more than its breadth, then its are is
(a) 124 m2
(b) 144 m2‑(c) 114 m2
(d) 104 m2