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Approximation
Directions (01-05): What approximate value should come in the place of (?) in the following questions.
1) √255 + √1370 + √575 = ? * 7.02
A.13
B.11
C.16
D.20
E.8
2) 20.24 % of 419.93 + 14.92 * 12.13 = ?
A.268
B.250
C.264
D.256
E.278
3) 59.98 % of 119.89 + ? = 32.98 * 3.99
A.90
B.40
C.50
D.60
E.80
4) 14.28 % of 104.97 + √399 = ? – 79.95
A.115
B.135
C.145
D.125
E.105
5) 83.33 % of 479.92 + 24.93 % of 39.89 = ? * 9.99
A.31
B.37
C.41
D.48
E.55
Train
6) The length of platform is 50% more than the length of the train A and the speed of the train A is 90 kmph. The ratio of the length of train A and B is 4:3 and the speed of the train B is 60 kmph. If the train A crosses a platform in 40 seconds, then what is the time taken by train A crosses train B is running in the same direction?
A.84 seconds
B.78 seconds
C.96 seconds
D.120 seconds
E.None of these
SI AND CI
7) The difference between Simple interest and Compound interest accrued on a sum of 25000 at the same rate of interest for 2 years is 62.5. Find the rate of interest.
A.10%
B.15%
C.20%
D.5%
E.7.5%
Mensuration
8) Volume of the cuboid is 3240 cm3Â and the ratio of the length, height and breadth of the cuboid is 6:5:4. If the height of the cuboid is equal to the side of the cube, then what is the surface area of the cube?
A.1650 cm2
B.1860 cm2
C.1290 cm2
D.1350 cm2
E.None of these
Ages
9) The average ages of Divya and Esai is 27 years and the average ages of Seetha, Divya and Esai is 24 years. If the average age of Arul, Banu and Seetha is 20 years, then find the average ages of Arul and Banu?
A.20 years
B.21 years
C.23 years
D.24 years
E.27 years
Mensuration
10) The ratio of the radius of cone to cylinder is 1:2 and the ratio of the height of the cone to cylinder is 4:3. What is the ratio of the volume of cone to Cylinder?
A.2:7
B.2:5
C.1:6
D.1:9
E.3:7
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Answers :
1) Answer: B
√255 + √1370 + √575 = ? * 7.02
16 + 37 + 24 = ? * 7
11 = ?
2) Answer: C
20.24 % of 419.93 + 14.92 * 12.13 = ?
84 + 180 = ?
? = 264
3) Answer: D
59.98 % of 119.89 + ? = 32.98 * 3.99
72 + ? = 132
? = 60
4) Answer: A
14.28 % of 104.97 + √399 = ? – 79.95
(1/7) * 105 + 20 = ? – 80
115 = ?
5) Answer: C
83.33 % of 479.92 + 24.93 % of 39.89 = ? * 9.99
(5/6) * 480 + (1/4) * 40 = ? * 10
41 = ?
6) Answer: A
Length of train A = 4x
Length of train B = 3x
Length of platform = 4x * 150/100 = 6x
10x =90 * 5/18 * 40
x = 100
Length of train A = 4 * 100 = 400 m
Length of train B = 3 * 100 = 300 m
Required time = (400 + 300)/((90 – 60) * 5/18)
= 84 seconds
7) Answer: D
8) Answer: D
6x * 5x * 4x = 3240
x = 3
Height of the cuboid = 5 * 3 = 15 cm
SA of the cube = 6 * 15 * 15 = 1350 cm2
9) Answer: B
Divya + Esai = 27 * 2 = 54
Divya + Esai + seetha = 24 * 3 = 72
Seetha = 72 – 54 = 18 years
Arul + Banu + seetha = 20 * 3 = 60
Arul + Banu = 60 – 18 = 42 years
Required average = 42/2 = 21 years
10) Answer: D
Radius of the cone = x
Radius of the cylinder = 2x
Height of cone = 4y
Height of cylinder = 3y
Required ratio = 1/3 * 22/7 * x * x * 4y: 22/7 * 2x * 2x * 3y
= 1:9
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