Consider the following figure.What is radius of the outer circle? [Both these circles have a common centre.]

10 cm

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

4 cm

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

13 cm

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

12 cm

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

Open in App

Solution

The correct option is D 12 cm
Two circles are concentric becuase they have a common centre. From the figure, we see, the distance between the outlines of the circles is 4 cm. The radius of the inner circle is 8 cm. Therefore, the radius of the outer circle is 4+ 8 = 12 cm.

Suggest Corrections

Similar questions

Q. The distance between the centres of two circles having a radii

4.5

cm and

3.5

cm respectively is

10

cm. What is the length of the transverse common tangent of these circles?

Two circles of radius 3 cm and 5cm have a common centre, O. AB is a chord to both the circles and length of CD is $2 \sqrt{5}$ cm. Find the distance of the chord from the centre and the length AC.

Q. In the following figure, point 'A' is the centre of the circle. Line MN is tangent at point M. If AN

= 10

cm and MN

= 5

cm, determine radius of the circle.

In the given figure, O is the centre of two concentric circles of radii 6 cm and 10 cm. AB is a chord of outer circle which touches the inner circle. The length of chord AB is

(a) 8 cm (b) 14 cm (c) 16 cm (d) $\sqrt{136}$ cm

Q. In the given figure, two concentric circles are drawn. If the radius of an inner circle = 3 cm and the length of the chord of an outer circle which touches an inner circle = 8 cm then, find the radius of an outer circle.

Join BYJU'S Learning Program

Consider the following figure.What is radius of the outer circle? [Both these circles have a common centre.]

The correct option is D 12 cmTwo circles are concentric becuase they have a common centre. From the figure, we see, the distance between the outlines of the circles is 4 cm. The radius of the inner circle is 8 cm. Therefore, the radius of the outer circle is 4+ 8 = 12 cm.

The correct option is D 12 cm
Two circles are concentric becuase they have a common centre. From the figure, we see, the distance between the outlines of the circles is 4 cm. The radius of the inner circle is 8 cm. Therefore, the radius of the outer circle is 4+ 8 = 12 cm.