JEE MATHEMATICS MCQ: MAXIMA & MINIMA

1 Easy

1 of 1

Analyzing +4 | -1

Consider a cuboid of sides

2x,\,4x\,\,{\text{and}}\,{\text{5x}}

and a closed hemisphere of radius

r.

If the sum of their surface areas is a constant

k,

then the ratio

x:r,

for which the sum of their volumes is maximum, is

View answer and explanation

Correct option: B

19:45

Option B (

19:45

) is correct because it represents the ratio

x:r

that maximizes the sum of the volumes given the constraint on the surface areas.

More Questions from MAXIMA & MINIMA

Practice All Chapter MCQs →

f(x)=\left(1+b^2\right) x^2+2 b x+1

m(b)

f(x)

b

m(b)

f: R \rightarrow R

f(x)=(x-3)^{n_1}(x-5)^{n_2}, n_1, n_2 \in N

|2 a x-3|+|a x+1|+|5-a x|=\frac{1}{2}

f(x)=2 x^{3}+(2 p-7) x^{2}+3(2 p-9) x

x<0

x>0

p

f\left( x \right)

f\left( x \right) = {\tan ^{ - 1}}x - \frac{1}{2}{\log _e}x

\left[ {1/\sqrt 3 ,\;\sqrt 3 } \right]

f(x)=\left(\frac{\sqrt{3 e}}{2 \sin x}\right)^{\sin ^{2} x}, x \in\left(0, \frac{\pi}{2}\right),

\frac{k}{e}

\left(\frac{k}{e}\right)^{8}+\frac{k^{8}}{e^{5}}+k^{8}