CLEAR
Toprankers-Info

+91 7676564400

Mobile App

Get it on Google Play
Discussions
Select Date
Tags:

Articles

Discussions
Submit Discussion
Mohit Kumar

· started a discussion

· 1 Months ago

circumference is taken wrong (Question: 85128.0 )

the circumference should be 2r+2pir

Question:
If a wire of 20 cm long is bent in to an arc of a circle subtending an angle of 90o at the center, then the radius of the circle (in cm.) is:
Options:
A) \(\cfrac{30}{π}\) cm
B) \(\cfrac{40}{π}\) cm
C) \(\cfrac{50}{\pi}\) cm
D) None of these
Solution:
Ans: (b) Circumference of arc


Knowledge Expert

· commented

· 1 Months ago

Dear Student,
The given answer is correct.
Please refer given solution,

The formula the arc measure is:
arc length = 2πR (C/360)

where:
C is the central angle of the arc in degrees
R is the radius of the arc

Put arc lenght on LHS = 20 , C =90 , now calculate R.

Thanks and Regards
Team TR
-logo
We at aim to provide most comprehensive content & test for practice which is carefully divided into various chapters and topics to help you focus on your weak areas.Our Practice mock test gives you unmatched analytics to help you realize your strong areas,time management and improvement areas.Our Short & Crisp notes on each topic will help you to quickly revise the topic along with the tips & tricks of the exams.
More About
-Info
-Info

Mobile App

Get it on Google Play
About Us Campus Ambassador Careers Contact Us Refund Policy

All Rights Reserved Top Rankers

User Policy
Disclaimer
Terms & Conditions