Q78 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 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


Slant height


Here, r=7cm and l=25cm



Volume of a cone



Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).

More from this chapter

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76

For a right circular cylinder of base radius = 7 cm and height = 14 cm, which is false?

 77

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,

 79

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


80

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