Staff Selection Commission Sub Inspector Exam
Question : What is the radius of a normal cylinder whose height is 21 cm and curved surface area is 1386 cm2?
Option 1: 10.5 cm
Option 2: 3.5 cm
Option 3: 7 cm
Option 4: 10 cm
Correct Answer: 10.5 cm
Solution : Given: Height($h$) = 21 cm Let the radius be $r$. Curved surface area = 1386 cm2 ⇒ $1386=2\pi r h$ ⇒ $1386=2\times\frac{22}{7}\times21\times r $ ⇒ $r=\frac{1386\times 7}{2\times 22\times21}$ ⇒ $r = 10.5~\text{cm}$ Hence, the correct answer is 10.5 cm.
Question : Directions: In a certain code language, GRANTED is written as HPBLUCE and FRAGMENT is written as GPBENCOR. How will IGNORE be written in that language?
Option 1: JFMPSC
Option 2: JIOQTG
Option 3: KHLNPC
Option 4: JEOMSC
Correct Answer: JEOMSC
Solution : Given: GRANTED is written as HPBLUCE and FRAGMENT is written as GPBENCOR.
Add 1 and subtract 2 alternately from the place value of the letters of GRANTED to obtain the required code – G + 1 = H, R – 2 = P, A +
Question : The least number to be subtracted from 36798 to get a number which is exactly divisible by 78 is:
Option 1: 18
Option 2: 60
Option 3: 38
Option 4: 68
Correct Answer: 60
Solution : The given number is 36798. The divisor is 78. Divide 36798 by 78 and get the remainder. Remainder = $\frac{36798}{78}$ → 60 So, the least number to be subtracted from 36798 to get a number exactly divisible by 78 is 60. Hence, the correct answer
Question : $\triangle$ ABC is a right-angled triangle with AB = 6 cm, BC = 8 cm. O is the incentre of the triangle. The radius of the in-circle is:
Option 1: 3 cm
Option 2: 4 cm
Option 3: 2 cm
Option 4: 5 cm
Correct Answer: 2 cm
Solution : AB = 6 cm, BC = 8 cm By Pythagoras theorem, $AC^2=AB^2+BC^2$ $AC = \sqrt{6^2+8^2}$ = $\sqrt{36+64}$ = $\sqrt{100}$ = $10$ cm $OP = OQ = OR = r$ Since tangents drawn from a point to the circle are equal, $RB = BP =
Question : Which is the largest six-digit number, which when divided by 12, 15, 20, 24 and 30, leaves the remainder 8, 11, 16, 20 and 26 respectively.
Option 1: 999956
Option 2: 999982
Option 3: 999960
Option 4: 999964
Correct Answer: 999956
Solution : LCM of 12, 15, 20, 24, 30 is 120 As we know, (12 – 8) = (15 – 11) = (20 – 16) = (24 – 20) = (30 – 26) = 4 As we know, The largest 6-digit number = 999999 ⇒ Number divisible
Question : Directions: Neha departs from her home and walks 51 m towards the south and then turns left and walks 44 m. Now she turns left again and walks 83 m. How far is she from a pole that is exactly 32 m north of her home now? (Assuming that all turns are 90° turns only.)
Option 1: 14 m
Option 2: 44 m
Option 3: 7 m
Option 4: 39 m
Correct Answer: 44 m
Solution : Firstly, we will draw the diagram as per the given instructions –
Here, A is the starting point and D is the endpoint. Thus, the distance between the pole and Neha's endpoint is 44 m.
So, Neha is 44 m away from the pole.
Question : The production of AB company increased by 10% after one year, and in the next year, it increased by 22%. In the third year, it increased by 5%. What overall change (in %) has been there in the production in three years from the original production?
Option 1: 41.5%
Option 2: 40.9%
Option 3: 41.2%
Option 4: 42.8%
Correct Answer: 40.9%
Solution : Let the initial Production be 100. The production of AB company after 1 year with a 10% increase = 110 The production of AB company after 2 years with a 22% increase = $110+\frac{22}{100}\times 110=134.2$ The production of AB company after 3 years with a
Question : Directions: The given pie chart shows the cars sold by a company in 2015–2016 of different models.
If the number of cars in model D is 40,500, then how many more cars in model E are sold than those in model A?
Option 1: 8,100
Option 2: 16,200
Option 3: 24,600
Option 4: 13,500
Correct Answer: 13,500
Solution : Number of cars sold in model D = $40,500$ $90^{\circ}$ ⇒ $40,500$ $1^{\circ}$ ⇒ $\frac{40500}{90}$ = $450$ Number of cars sold in model E = $75^{\circ}$ Number of cars sold in model A = $45^{\circ}$ Number of cars sold in model E is more than
Question : Directions: Select the number–pair in which the two numbers are related in the same way as the two numbers of the following number–pair. 14 : 588
Option 1: 20 : 980
Option 2: 18 : 972
Option 3: 12 : 666
Option 4: 11 : 344
Correct Answer: 18 : 972
Solution : Given: 14 : 588
The second term is divided by the first term is equal to one–third of the first term. Here in, 14 : 588→588 ÷ 14 = 42 = 14 × 3 Let's check the options – First option: 20 :
Question : "Wings of Fire" is the autobiography of _______.
Option 1: Zakir Hussain
Option 2: Rajendra Prasad
Option 3: A. P. J. Abdul Kalam
Option 4: K. R. Narayanan
Correct Answer: A. P. J. Abdul Kalam
Solution : The correct option is A. P. J. Abdul Kalam.
Dr. A. P. J. Abdul Kalam, popularly known as the Missile Man of India, wrote his autobiography, Wings of Fire (1999). He co-wrote it with Arun Tiwari. The book provides insights into
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