Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
85 views
in 3D Coordinate Geometry by (15 points)
the radius of a metal circular plate is increased by 10% whn heated. by what percentage does the area increase by?

Please log in or register to answer this question.

1 Answer

0 votes
by (37.4k points)

R is original radius

\(\frac {r+10r}{100}\) or \(\frac {11 r}{10}\) is new radius

\(\therefore\) Increment percentage = \(\frac {\pi (\frac {11r}{10})^2 - \pi r^2}{\pi r^2} \times 100\) 

\(\frac {\pi r^2 (\frac {121}{100}-1)}{\pi r^2} \times 100\)

\(\frac {21}{100} \times 100\%\) 

= 21%

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...