Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • need solution for rd sharma maths class 12 chapter 12 derivatives as a rate measure exercise fill in the blanks question 7

need solution for rd sharma maths class 12 chapter 12 derivatives as a rate measure exercise fill in the blanks question 7

Answers (1)

Answer: \frac{1}{30\pi }ft/min

Hint: Here we use the formula of volume, V=\frac{4}{3}\pi r^{3}

Given:\frac{dV}{dt}=30\; cm^{3}/sec

Solution: V=\frac{4}{3}\pi r^{3}

              \frac{dV}{dt}=4\pi r^{2}\left ( \frac{dr}{dt} \right )

               \frac{dr}{dt}= \left [ \frac{dV}{dt} \right ]/4\pi r^{2}

               \frac{dr}{dt}= \left [ \frac{30}{\left [ 4\times \pi \times 15\times 15 \right ]} \right ]

                    = \frac{1}{30\pi }ft/min   

Posted by

infoexpert26

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

Board Exam Time Table 2025 Live: UP Board exams from February 24; CBSE, BSEB date sheet soon
anam-khan

CBSE Date Sheet 2025 Live: Class 10, 12 board exam dates soon; syllabus, sample papers
anam-khan

Extra time in CBSE exams for students with type 1 diabetes: Kerala SHRC seeks report on plea

Latest Question