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
>>
Differential Equations
0
votes
The surface area of a balloon being inflated, changes at a rate proportional to time t. If initially its radius is 1 unit and after 3 seconds it is 2 units, find the radius after time 't'.
cbse
class12
additionalproblem
kvquestionbank2012
ch9
q23
p34
sec-a
math
Share
asked
Feb 4, 2013
by
meena.p
retagged
Dec 19, 2013
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
The volume of spherical balloon being inflated changes at a constant rate.If initially its radius is 3units and after 3seconds it is 6units.Find the radius of balloon after t seconds.
asked
Nov 30, 2012
by
sreemathi.v
cbse
class12
bookproblem
ch9
sec4
q19
p396
sec-c
math
0
votes
1
answer
The volume of spherical balloon being inflated changes at a constant rate. If initially its radius is 3 units and after 3 seconds it is 6 units. Find the radius of balloon after t seconds.
asked
Feb 6, 2013
by
thanvigandhi_1
cbse
class12
modelpaper
2012
sec-b
q18
medium
math
0
votes
0
answers
Newtons law of cooling states that the rate of change of the temperature T of an object is proportional to the difference between T and the (constant) temperature t of the surrounding medium. We can write it as \[\frac{dT}{dt}=-K(T-t),K>0\; constant.\]A cup of coffee is served at $ 185^\circ F$ in a room where the temperature is $65^\circ F .$ Two minutes later the temperature of the coffee has dropped to $155^\circ F.$(log 3/4=0.144, log3 = 1.09872). Find the time required for coffee to have $105^\circ F$ temperature.
asked
Feb 4, 2013
by
meena.p
cbse
class12
additionalproblem
kvquestionbank2012
ch9
q25
p34
sec-c
math
0
votes
0
answers
A wet porous substance in the open air losses its moisture at a rate proportional to the moisture content. If a sheet hung in the wind loses half of its moisture during the first hour, when will it have lost 95% moisture, weather conditions remaining the same.
asked
Feb 4, 2013
by
meena.p
cbse
class12
additionalproblem
kvquestionbank2012
ch9
q22
p34
sec-b
math
0
votes
0
answers
When the interest is compounded continuously, the amount of money invested increases at a rate proportional to its size. If Rs.1000 is invested at 10% compounded continuously, in how many years will the original investment double itself?
asked
Feb 4, 2013
by
meena.p
cbse
class12
additionalproblem
kvquestionbank2012
ch9
q20
p34
sec-c
math
0
votes
0
answers
A population grows at the rate of 8% per year. How long does it take for the population to double?
asked
Feb 4, 2013
by
meena.p
cbse
class12
additionalproblem
kvquestionbank2012
ch9
q21
p34
sec-b
math
0
votes
0
answers
A balloon which always remains spherical is being inflated by pumping in gas at the rate of $900\; cm^3$/sec. Find the rate at which the radius of the balloon is increasing when the radius of the balloon is 15 cm
asked
Jan 29, 2013
by
meena.p
cbse
class12
additionalproblem
kvquestionbank2012
ch6
q60
p20
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
...