Ask Questions, Get Answers
Menu
X
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
5 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
studyplans
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
5 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
mobile
exams
ask
sample papers
teach
pricing
sign-in
Download our FREE mobile app with 1000+ tests for CBSE, JEE MAIN, AIPMT
X
Search
Topics
Want to ask us a question?
Click here
Browse Questions
Student Questions
Ad
Home
>>
CBSE XII
>>
Math
>>
Application of Derivatives
0
votes
A metal box with a square base and vertical sides is to contain 1024$cm^3$.The material for the top and bottom costs Rs 5/$cm^2$ and the material for the sides costs Rs2.50/$cm^2$.Find the least cost of the box.
cbse
class12
ch6
q33
p138
exemplar
math
sec-c
Share
asked
Jan 11, 2013
by
sreemathi.v
retagged
Mar 27, 2014
Please
log in
or
register
to add a comment.
Can you answer this question?
Do not ask me again to answer questions
Please
log in
or
register
to answer this question.
Related questions
0
votes
1
answer
A tank with rectangular base and rectangular sides, open at the top is to be constructed so that its depth is $2 m$ and volume is $8 m^3$. If building of tank costs Rs 70 per sq metres for the base and Rs 45 per square metre for sides. What is the cost of least expensive tank?
asked
Nov 28, 2012
by
thanvigandhi_1
cbse
class12
bookproblem
ch6
misc
q9
p242
sec-c
medium
math
0
votes
0
answers
The sum of the surface area of a rectangular parallelepiped with sides x,2x and $\Large\frac{x}{3}$ and a sphere is given to be constant.Prove that the sum of their volume is minimum,if x is equal to three times the radius of the sphere.Also find the minimum value of the sum of their volumes.
asked
Jan 11, 2013
by
sreemathi.v
cbse
class12
ch6
q34
p138
exemplar
math
sec-c
0
votes
1
answer
A ladder, 5 meter long,standing on a horizontal floor,leans against a vertical wall.If the top of the ladder slides downwards at the rate of 10cm/sec,then the rate at which the angle between the floor and the ladder is decreasing when lower end of ladder is 2 meters from the wall measure in "radian/seconds" is?
asked
Jan 11, 2013
by
sreemathi.v
cbse
class12
ch6
q36
p138
objective
exemplar
medium
sec-a
math
0
votes
1
answer
a closed rectangular bos is to be made to contain 80 metre cube of water. the cost of the material per sqaure metre for the bottom is rs.3for the top is rs.2 and for the sides is rs.2. the labour charges for making the box are rs. 200. find the dimensions of the box when the cost is minimum.
asked
Jul 3
by
nijjharnavjeet
0
votes
0
answers
A tank with rectangular base and rectangular sides, open at the top is to be constructed so that its depth is 2m and volume is \( 8m^3\). If building of tank costs Rs. 70 per sq. metre for the base and Rs.45 per sq. metre for sides, what is the cost of least expensive tank?
asked
Feb 15, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-c
q23
math
0
votes
1
answer
If the sum of the surface areas of cube and a sphere is constant.What is the ratio of an edge of the cube to the diameter of the sphere,when the sum of their volumes is minimum?
asked
Jan 11, 2013
by
sreemathi.v
cbse
class12
ch6
q31
p138
exemplar
difficult
sec-c
math
0
votes
1
answer
AB is a diameter of a circle and C is any point on the circle.Show that the area of $\bigtriangleup ABC$ is maximum,when it is isosceles.
asked
Jan 11, 2013
by
sreemathi.v
cbse
class12
ch6
q32
p138
exemplar
difficult
sec-c
math
Ask Question
SUBMIT QUESTION
►
Please Wait
Take Test
JEEMAIN Crash Practice
15 Test Series
AIPMT Crash Practice
5 Test Series
JEEMAIN
350+ TESTS
AIPMT
320+ TESTS
CBSE XI MATH
50+ TESTS
CBSE XII MATH
80+ TESTS
x
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...