Question

12. Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its radius.​

Answer 1

Answer:

5.25 cm

Step-by-step explanation:

bcz the diameter is 10.5 and

r = d/2 = 10.5/2 = 5.25 cm

hope it helps...

Answer 2

$\large\bf\underline\pink{slant\:height(l)=}$10cm

$\large\bf\underline\orange{Diameter(d)=}$10.5cm

$\large\bf\underline\green{Radius(r)=}$d/2

$r = \frac{10.5}{2}cm$

$\boxed{\fcolorbox{red}{yellow}{Curved Surface area of cone=πrl}}$

=$\frac{22}{7} \times \frac{10.5}{2} \times 10$

$= 11 \times 15.0$

$= 11 \times 15$

$= {165cm}^{2}$

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${\large{\underline{\underline{\sf{\red{Additional\:Imformation:-}}}}}}$

${\boxed{\pink{\tt{Total\:surface\:area\:of\:a right\:circular\:cone}}}}$

$= πrl + {πr}^{2}$

${\boxed{\purple{\tt{Volume\:of\:cone}}}}$

$= \frac{1}{3}π {r}^{2}h$

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