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Question : If the radius of a cylinder is decreased by 12%, then by how much percentage must its height be increased so that the volume of the cylinder remains the same?

Option 1: 29.13%

Option 2: 21.78%

Option 3: 42.56%

Option 4: 34.27%

Team Careers360 26th Jan, 2024

Correct Answer: 29.13%


Solution : Let's denote the original radius of the cylinder as $r$ and the original height as $ℎ$.
Now, if the radius is decreased by 12%,
⇒ $r$′ = $r$ −0.12$r$ = 0.88$r$
⇒ $V'$ = $π(0.88r)^2h'$
Since the volume remains the same
⇒ $πr^{2}h$ = $π(0.88r)^2h'$

13 Views

Question : If $a^{2}+b^{2}+c^{2}=ab+bc+ca,$ then the value of $\frac{a+c}{b}$ is:

Option 1: 3

Option 2: 2

Option 3: 0

Option 4: 1

Team Careers360 26th Jan, 2024

Correct Answer: 2


Solution : Given: $a^{2}+b^{2}+c^{2}=ab+bc+ca$
⇒ $a^{2}+b^{2}+c^{2}-ab-bc-ca=0$
⇒ $\frac{1}{2}\left[(a-b)^{2}+(b-c)^{2}+(c-a)^{2}\right]=0$
⇒ $(a-b)^{2}+(b-c)^{2}+(c-a)^{2}=0$
The square of any real number is always non-negative.
Therefore, we have:
$(a-b)^{2}=0 \Rightarrow a=b$
$(b-c)^{2}=0 \Rightarrow b=c$
$(c-a)^{2}=0 \Rightarrow c=a$
Thus, we have $a=b=c$. Now, we can calculate $\frac{a+c}{b}$ as follows:
$\frac{a+c}{b}=\frac{a+a}{a}=2$
Hence, the correct answer

21 Views

Question : Select the INCORRECTLY spelt word.

Option 1: Adjacent

Option 2: Accomplish

Option 3: Agregate

Option 4: Allure

Team Careers360 27th Jan, 2024

Correct Answer: Agregate


Solution : The correct answer is the third option.

The correct spelling of the word is "aggregate". Aggregate generally means a whole formed by combining several elements. It can also refer to the total or sum of individual parts.

11 Views

Question : Which British Viceroy of India was associated with the Ilbert Bill enacted in 1884?

Option 1: Lord Ripon

Option 2: Lord Dufferin

Option 3: Lord Northbrook

Option 4: Lord Napier

Team Careers360 27th Jan, 2024

Correct Answer: Lord Ripon


Solution : The correct option is Lord Ripon.

The British Viceroy of India associated with the Ilbert Bill enacted in 1884 was Lord Ripon. He served as the Viceroy of India from 1880 to 1884, and the Ilbert Bill was one of the significant legislative

11 Views

Question : Who was hailed as a resident dancer of Tirumala Tirupati Devasthanam for her unique contribution to the promotion of classical dance forms?

Option 1: Uma Sharma

Option 2: Rukmini Devi

Option 3: Yamini Krishnamurthy

Option 4: Ragini Devi

Team Careers360 26th Jan, 2024

Correct Answer: Yamini Krishnamurthy


Solution : The correct option is Yamini Krishnamurthy.

In Madras, Yamini Krishnamurthy made his debut in 1957. She enjoys the privilege of being the Tirumala Tirupati Devasthanam's Asthana Nartaki (resident dancer). She is a renowned Indian classical dancer, primarily in Bharatanatyam and Kuchipudi styles. She's

22 Views

Question : Who is famously known as Bihar Kesari?

Option 1: Rajendra Prasad

Option 2: Shri Krishna Singh

Option 3: Karpuri Thakur

Option 4: Lala Lajpat Rai

Team Careers360 27th Jan, 2024

Correct Answer: Shri Krishna Singh


Solution : The correct option is Shri Krishna Singh.

"Bihar Kesari" is a title conferred upon Dr. Sri Krishna Singh, who was an eminent political leader. He played a significant role in the Indian independence movement and served as the Chief Minister from 1937 to

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