Use app×
QUIZARD
QUIZARD
JEE MAIN 2026 Crash Course
NEET 2026 Crash Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
146 views
in Mathematics by (60.1k points)
closed by

एक घड़ी की मिनट की सूई जिसकी लंबाई 14 cm है। इस सूई द्वारा 5 मिनट में रचित क्षेत्रफल ज्ञात कीजिए।

1 Answer

+1 vote
by (59.3k points)
selected by
 
Best answer

5 मिनट में रचित केद्रीय कोण \(=\frac{360^{\circ}}{60} \times 5=30^{\circ}\)

\(\therefore\) सूई द्वारा रचित क्षेत्रफल \(=\frac{\pi r^2}{360} \times \theta\)

\(=\frac{\frac{22}{7} \times 14^2}{360} \times 30 \mathrm{~cm}^2 \)

\(=\frac{22 \times 14 \times 2}{12} \mathrm{~cm}^2\)

\(=\frac{154}{3} \mathrm{~cm}^2\)

\(=51 \frac{1}{3} \mathrm{~cm}^2\)

Related questions

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

...