Page 151 - AFCAT Solved Papers 2011 - 2019 SSBCrack eBook

78. (c) Let the number be = x 82. (d) Let largest no. = x
\ x + 10 = 3 (x – 10)
(x + 10) ´ 7 88
\ – 5 = 10 + 30 = 3x – x
5 2 40 = 2x
7x + 70 – 25 = 220 x = 20
7x = 220 – 55 \ other number = 20
7x = 175 83. (b) Let P = ` x
x = 25 x ´ 10 10
´
\ Number is 25. SI = 100 = x
79. (d) Let average of all persons = x A = P + SI
\ (13 × 79) + 6(x + 4) = 19 × x 22500 = x + x
13 × 79 + 6x + 24 = 19x 2x = 22500
13 × 79 + 24 = 13x x = 11250
\ He took 11,250 as a lone.
13 ´ 79 + 24 84. (c) Let P = x
x = = 80.25
13 A = 3x
Total money spent = 1536 SI = 2x
80. (b) Let first complete the job in = x minutes T = 8 years
Second complete the job in = y minutes 2x ´ 100 25
R = = 25%
1 1 1 x ´ 8
\ + = ...(1) 4
x y 6
5
x ´ 25 ´ 20
4 6 1 4 = 5x
and + = 1 - = ...(2) Now SI =
x y 5 5 100
5
By (1) and (2) A = 5x + x = 6x
x = 10, y = 15 \ In 6 years is becomes 6 times
Hence slower typist complete the jobs in 15 minutes.
81. (a) Let 25 paise coins = x 85. (b) 69 ´ 69 ´ 69 – 65 ´ 65 ´ 65
´
1 ` : 50 P : 25 P 69 ´ 69 + 69 65 + 65 ´ 65
3x : 220 – 4x : x Ratio in number of coins a - 3 b 3
220 – 4x x Using 2 2 = a – b
3x : : Ratio in amount a + ab + b
2 4
\ 69 – 65 = 4
x
\ 3x + 110 – 2x + = 160
4 90. (d) J S

x
x + 110 – 2x + = 160
4 JS
x
x + 110 + = 160
4 91. (c)
4x + 440 + x = 640 D D M
5x = 200 DM
x = 40 95. (b) In this figure shaded regios covers all the three circles
\ 50 paise coins = 220 – 40yx = 220 – 160 = 60 and in rest figures only two circles.