The radii of two circles are $25 c m$ and $18 c m$ . Find the radius of the circle which has a circumference equal to the sum of the circumference of these two circles.

43 c m

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

12 c m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

34 c m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

40 c m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $43 c m$
The circumference of a circle $= 2 π r$
Let $R$ be the radius of the circle which has a circumference equal to the sum of the circumferences of the two circles.
$2 π R = 2 π \times 25 + 2 π \times 18$
$⟹ R = 25 + 18 = 43 c m$

Suggest Corrections

Similar questions

15 c m

18 c m .

Join BYJU'S Learning Program