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Question

Assertion :If the height of a cone is 24 cm and diameter of the base is 14 cm, then the slant height of the cone is 15 cm. Reason: If r be the radius and h be the height of the cone, then slant height =h2+r2

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution

The correct option is D Assertion is incorrect but Reason is correct
We know that slant height =l=h2+r2
So reason is true,.
Now it is given that height =h=24 cm, diameter=14 cm
radius =r=d2=142=7 cm
l=(24)2+72=25
Assertion is false .
So, option D is correct.

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