Q79 of 189 Page 512

The question consists of two statements, namely, Assertion (A) and Reason (R). Please select the correct answer.

Assertion (A)

Reason (R)

The surface area of a sphere is Its volume is

The volume of a sphere of radius is

Surface area of a sphere

Given Surface area = 2464 cm²

Volume of a sphere

Volume

Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).

Which is false?

A metal pipe is 63 cm long. Its inner diameter is 4 cm and the outer diameter is 4.4 cm. Then,

The question consists of two statements, namely, Assertion (A) and Reason (R). Please select the correct answer.

Assertion (A)	Reason (R)
The base radius of a cone is 7 cm and its slant height is 25 cm. The volume of the cone is	The volume of a right circular cone of base radius and height is

The question consists of two statements, namely, Assertion (A) and Reason (R). Please select the correct answer.

Assertion (A)	Reason (R)
The outer and inner radii of a hollow cylinder 2 m 10 cm long are 5 cm and 3 cm respectively. If it is made up of copper, then volume of copper in it is	The volume of a hollow cylinder of length external radius and internal radius is given by

The question consists of two statements, namely, Assertion (A) and Reason (R). Please select the correct answer.

Assertion (A)	Reason (R)
If the radius of a sphere is doubled then the ratio of the volume of the first sphere to that of the second is 1 : 8.	A cone and a hemisphere have equal bases and equal volumes. The ratio of their heights is 1 : 2.

The question consists of two statements, namely, Assertion (A) and Reason (R). Please select the correct answer.Assertion (A)Reason (R)The surface area of a sphere is Its volume is The volume of a sphere of radius is