Mark the correct answer-AssertionA- The total surface area of a cone whose radius is r-2 and slant height 2l is -rl - r-4ReasonR- Total surface area of cone is -rl-r where r is radius and l is the slant height of the cone-

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Shape Conversion of Solids

Mark the corr...

Question

Mark the correct answer.

Assertion(A): The total surface area of a cone whose radius is $\frac{r}{2}$ and slant height 2l is πr $(l + \frac{r}{4})$

Reason(R): Total surface area of cone is πr(l+r) where r is radius and l is the slant height of the cone.

Both A and R are true, and R is the correct explanation of A.

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A is false but R is true.

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Both A and R are true, but R is not the correct explanation of A.

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A is true but R is false.

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Solution

The correct option is A Both A and R are true, and R is the correct explanation of A.

The correct option is (A).

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Similar questions

Question 5
The total surface area of a cone whose radius is $\frac{r}{2}$ and slant height 2l is:

A) $2 π r (l + r)$
B) $π r (l + \frac{r}{4})$
C) $π r (l + r)$
D) $2 π r l$

Q. The total surface area of a cone whose radius is

\frac{r}{2}

and slant height 2l is
(a)

2 π r (l + r)

(b)

π r (l + \frac{r}{4})

(c)

πr (l + r)

(d)

2 π r l

Assertion: The total surface area of a cone whose radius is $\frac{r}{2}$ and slant height $2 l$ is $(π) r (l + \frac{r}{4})$ .

Reason: Total surface area of cone is $π r (l + r)$ where $r$ is radius and $l$ is the slant height of the cone.

Which of the following is correct?

The total surface area of a cone whose radius is r/2 and slant height 2l is

Find the total surface area of a cone whose radius is $\frac{r}{2}$ and slant height is $2 l .$

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Mark the correct answer. Assertion(A): The total surface area of a cone whose radius is r2 and slant height 2l is πr(l+r4) Reason(R): Total surface area of cone is πr(l+r) where r is radius and l is the slant height of the cone.

The correct option is A Both A and R are true, and R is the correct explanation of A. The correct option is (A).

Mark the correct answer.

Assertion(A): The total surface area of a cone whose radius is $\frac{r}{2}$ and slant height 2l is πr $(l + \frac{r}{4})$

Reason(R): Total surface area of cone is πr(l+r) where r is radius and l is the slant height of the cone.

The correct option is A Both A and R are true, and R is the correct explanation of A.

The correct option is (A).