Question 11
The radius of a circle whose circumference is equal to the sum of the circumferences of the two circles of diameters 36 cm and 20 cm is
(A) 56 cm (B) 42 cm (C) 28 cm (D) 16 cm
Now,
Circumference of 18 cm circle + Circumference of 10 cm circle = Circumference of circle with radius r
2𝜋(18) + 2𝜋(10) = 2𝜋r
18 + 10 = r
28 = r
r = 28 cm
So, the correct answer is (C)
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.
Hi, it looks like you're using AdBlock :(
Displaying ads are our only source of revenue. To help Teachoo create more content, and view the ad-free version of Teachooo... please purchase Teachoo Black subscription.
Please login to view more pages. It's free :)
Teachoo gives you a better experience when you're logged in. Please login :)
Solve all your doubts with Teachoo Black!
Teachoo answers all your questions if you are a Black user!