Staff Selection Commission Sub Inspector Exam
Question : The largest sphere is carved out of a cube of side 7 cm. The volume of the sphere will be:
Option 1: 179.67 cm3
Option 2: 165.67 cm3
Option 3: 175.67 cm3
Option 4: 182.67 cm3
Correct Answer: 179.67 cm3
Solution : The diameter of the sphere is equal to the side of the cube. d = 7 cm r = $\frac{7}{2}$ cm The volume of a sphere $= \frac{4}{3}\pi r^3$ $V = \frac{4}{3}\pi \left(\frac{7}{2}\right)^3 = \frac{4×22}{3×7}× \frac{343}{8} = 179.67$ Hence, the correct answer is
Question : The length of the shadow of a vertical pole on the ground is 18 m. If the angle of elevation of the sun at that time is $\theta$, such that $\cos \theta=\frac{12}{13}$, then what is the height (in m) of the pole?
Option 1: 7.5
Option 2: 9
Option 3: 18
Option 4: 12
Correct Answer: 7.5
Solution : Let the height of the pole be h and the length of the shadow of the pole = base of the triangle = 18 m In $\triangle$ABC, ⇒ $\cos \theta =\frac{\text{Base}}{\text{Hypotenuse}}$ = $\frac{12}{13}$ ⇒ $\frac{18}{\text{Hypotenuse}}$ = $\frac{12}{13}$ $\therefore$ Hypotenuse = $\frac{18×13}{12}$ = $\frac{39}{2}$ m Now,
Question : Which of the following ratios is the greatest?
Option 1: 2 : 5
Option 2: 7 : 10
Option 3: 5 : 6
Option 4: 1 : 3
Correct Answer: 5 : 6
Solution : Given: The ratios are given. Convert the ratios in decimal form and find the greatest ratio. Option first: 2 : 5 $\frac{2}{5}=0.4$ Option second: 7 : 10 $\frac{7}{10}=0.7$ Option third: 5 : 6 $\frac{5}{6}=0.8$ Option fourth: 1 : 3 $\frac{1}{3}=0.3$ The greatest number
Question : Which among the following books was written by B. R. Ambedkar?
Option 1: The New Economic Menace of India
Option 2: Savitri
Option 3: Satyarth Prakash
Option 4: Annihilation of Caste
Correct Answer: Annihilation of Caste
Solution : The correct option is the Annihilation of the Caste.
"Annihilation of Caste" is a significant work by B. R. Ambedkar. Originally conceived as a speech for the annual conference of a Hindu reformist group, it was later published as a pamphlet in
Question : Directions: Which option represents the correct order of the given words as they would appear in the English dictionary? 1 Pelvic 2 Pentagon 3 Permanent 4 Persistent 5 Perceive
Option 1: 1, 2, 4, 3, 5
Option 2: 1, 3, 2, 4, 5
Option 3: 1, 2, 3, 4, 5
Option 4: 1, 2, 5, 3, 4
Correct Answer: 1, 2, 5, 3, 4
Solution : Given: 1. Pelvic 2. Pentagon 3. Permanent 4. Persistent 5. Perceive
Step 1: The first two letters of each word are the same, that is P and e. Step 2: The third letter of each word is l, n, r, r,
Question : Working 7 hours a day, 18 persons can complete a certain work in 32 days. In how many days would 14 persons complete the same work, working 8 hours a day?
Option 1: 42
Option 2: 30
Option 3: 35
Option 4: 36
Correct Answer: 36
Solution : Given: Working 7 hours a day, 18 persons can complete a certain work in 32 days. Usse the formula, $M_1\times D_1 \times T_1=M_2\times D_2 \times T_2$, where $M_1$, $M_2$, $D_1$, $D_2$, $T_1$ and $T_2$ are the men, days and time respectively. ⇒ $18\times 32 \times
Question : Who among the following Bahmani sultan was noted for cruelty and hence got the title "Zalim"?
Option 1: Alauddin Humayun Shah Bahmani
Option 2: Firuz Shah Bahmani
Option 3: Mujahid Shah Bahmani
Option 4: Ahmed Shah Al Wali Bahmani
Correct Answer: Alauddin Humayun Shah Bahmani
Solution : The correct answer is Alauddin Humayun Shah Bahmani.
Alauddin Humayun Shah Bahmani was the Sultan of the Bahmani kingdom. He was also known as "Shah Zalim" or "Zalim", which means "Humayun Shah the cruel". He was known for executing people in tortuous
Question : If $x+y+z=10$, $x y+y z+z x=25$ and $x y z=100$, then what is the value of $(x^3+y^3+z^3)$?
Option 1: 450
Option 2: 540
Option 3: 550
Option 4: 570
Correct Answer: 550
Solution : Given that $x + y + z = 10$, $xy + yz + zx = 25$, and $xyz = 100$. Now, $(x + y + z)^2 = x^2 + y^2 + z^2 + 2(xy + yz + zx)$ $⇒100 = x^2 + y^2 + z^2
Question : Select the option in which all the words are spelt correctly.
Option 1: Ritu is defecient in calcium.
Option 2: Ritu is deficient in calcium.
Option 3: Ritu is defisient in calcium.
Option 4: Ritu is daficient in calcium.
Correct Answer: Ritu is deficient in calcium.
Solution : The correct choice will be the second option.
The option in which all the words are spelt correctly is: Ritu is deficient in calcium.
Deficient: This word means lacking in a particular quality or quantity, especially in the context of nutrients
Question : What is the ratio by mass of nitrogen and hydrogen in ammonia?
Option 1: 11:1
Option 2: 14:3
Option 3: 11:3
Option 4: 14:1
Correct Answer: 14:3
Solution : The correct answer is 14:3.
The mass ratio of nitrogen to hydrogen is 14:3. As a result, three hydrogen atoms and one nitrogen atom combine to form a molecule with a molecular weight of 17. Ammonia, or NH₃, is the formula of the compound
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