CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

Assertion: The curved surface area of a cone is 550 cm2 and its diameter is 14 cm. Then, its slant height is 25 cm.
Reason: The curved surface area of a cone having base radius r and slant height l is πrl.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true and Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.


Solution

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

Reason (R) is clearly true.

 Curved surface area of the cone  = πrl                                                           =227×7×25                                                          =550 cm2
Reason (R) is clearly true.
Assertion (A) is true and reason(R)  is a correct explanation of assertion (A) .

Mathematics
RS Aggarwal (2017)
Standard IX

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
Same exercise questions
View More



footer-image