Page 140 - AFCAT Solved Papers 2011 - 2019 SSBCrack eBook

59. (b) Let son aged 19 years getting `x and son aged 17 years th
getting (88400 – x). 64. (a) In one minute A can fill ç æ 1 ö ÷ Part
At the age of 21, both will get equal amount è 20 ø

æ 10 ö 2 æ 10 ö 4 æ 1 ö th
-
x ç 1 + ÷ = (88400 x ) 1 + ÷ In one minute B can fill ç ÷ Part
ç
è 100 ø è 100 ø è 30 ø
In one minute A and B together can fill
121x 121 121
-
Þ = (88400 x ) ´ ´ th
100 100 100 1 + 1 = æ 1 ö Parts
20 30 è ç 12ø ÷
´
Þ 100x= 88400 121–121x
Þ 221x = 88400 × 121 A and B together can fill the tank in 12 minutes
65. (c) Speed of upstream = 9 – 1.5 = 7.5 Kmph
´
88400 121 Speed of down stream = 9 + 1.5 = 10.5 Kmph
Þ x= = 48400
221 105
x = ` 48400 Time taken for up stream = = 14h
7.5
5 110
60. (b) Speed of train = 132 kmph = 132 × m/s = m/s 105 = 10h
18 3 Time taken for down stream = 7.5
Total distance = 110m + 165m = 275m Total time taken = 10 + 14 = 24 hours
´
275 3
Time taken to cover the distance = = 7.5s.
110 Criminals
61. (c) If number of boys is x, then number of girls is (150–x) 66. (b) Thieves Judge
(150 – x ) = x % of 150
x 3x
150 – x = ´ 150=
100 2

5x World
Þ = 150
2
India
´
150 2
Þ x= = 60 67. (d)
5 Haryana
Number of boys is 60
62. (a) Difference in percentage of A and B = (40–30) = 10%
Difference in marks = 50
Let maximum marks be x
´
50 100
10% of x = 50 x = = 500 Bird
10
A scored 30% of 500 means 150 marks
minimum marks required to pass = 150 + 15 = 165 68. (a) Pigeon Dog
165
=
Pass % = ´ 100 33%
500
63. (d) Let time period be x years
´
´
´
´
6000 10 t 5000 12 t = 2400
+
100 100 Earth
Þ 600t + 600t = 2400
2400 69. (a) Sea Sun
Þ t = = 2
1200
Time period is 2 years.